All the questions you have posted you can see the answer in the Torah the bible and the Quran
There is no false God..actually there is no god but one out there…God is the supreme power someone who is not like anyone..he cannot be described with attributes and he cannot be as humans that is why we muslims have a problem in considering Jesus Christ as god because he is a human..he is inside everything and outside everything..he is here to be worshipped..there is no god beside him..he is all good perfect goodness..he is a savior through his mercy which means if someone commits a sin and repents God is ready always to forgive him…he has an absolute mercy
He is kind even for the disbelievers he is kind and merciful for everyone
even i personally have met a lot of worshipers for the recent years of my life that don't know the answers of these questions, though each of them read their scripture many times, which is also evidence that there is a need for the worshipers to seek That Who is really the true Lord God as well as His righteousness, not just to worship god
you say there is no god but One, and you are right in principle, but unfortunately there have also been other gods since the day of the Fall, such as brahma, vishnu, shiva, etc., given that satan himself(actually we should rather say 'itself') was the false one, not only initially, but also in general, because the other gods are actually (as it were) faces of satan, that is why the first of the Ten Commandments says "the worshiper shall have no other gods besides the true One", and the second of them similarly says "the worshiper shall not create any spiritual/religious theory or any spiritual/religious practice in conjunction with any thing that is either in the "heaven" or in the "earth" or in the "water", they shall not venerate such things, nor serve them (i.e. even if not they but someone else created them)", because the other gods can also be (very) wise to give spiritual theory and spiritual practice that can seem very genuine, but with which the worshiper can only worship and serve the wicked one, not the true One, or would you rather worship brahma, vishnu or shiva instead of the true One?!
i understand you as to your quandary about Jesus Christ, because many years ago i was also in a similar situation, i was a seeker and visited many different sects, not only christian, but also of other kinds, and the worshipers of each of them told me that only their god is the true one, and that i must follow only them leaving all others, and a few years after visiting those sects i remained very confused and was not sure who is the true God, and the only solution i found was to stop visiting those sects and start seeking That Who is really the true God, i began to invoke Him every day from the morning to the night, with words such as "i invoke That Who is really the true God of all the infinite universe, i don't want to have other gods besides Him, God, You Who are really the true One, come and take care of my lack of what you know that i need...", and i thought that every god may be the true One, either Jehovah, Allah, buddha, krishna, brahma, etc. - i expected everyone without knowing who is actually the true One, and one day after a few weeks of such a seeking/invocation, neither krishna, nor buddha, nor anyone else but Jesus Christ Himself appeared to me saying "I am the true One, my Heavenly Father and I are the only true Lord God, and there is no other - krishna, buddha, brahma, and the rest are false lords(christs) and gods..." - that vision was so bright and clear, and i was filled with great grace as if the very Kingdom of God was in me, and from that moment on i understood that God has an only begotten firstborn Son, namely Jesus Christ, Who is the Lord Himself, i don't say God the Father Himself, but the Lord(Christ) Himself, and that the worshipers have to honor Him as a Lord(Christ) - He, the Lord(Christ), is the only second one in the heavenly hierarchy after God the Father...
John 10:30 "I and my Father are one(i.e. I and my Father are the One Who is the true Lord God).",
1 Corinthians 11:3 "I would have you know, that the head of every man is Christ; and the head of the woman is the man; and the head of Christ is God.",
1 John 5:20-21 "we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life. Little children, keep yourselves from idols(also: from false gods/lords and misbeliefs). Amen.",
Genesis 1:26-28 "And God said, (Son of mine) Let us make man in our image, after our likeness(i.e. let Us make the user of the system of life and love):..... So God created man in his own image, in the image of God created he him(i.e. so the true Lord God created the human(s) as the user(s) of the system of life and love); male and female created he them. And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth(i.e. the world of the users), and subdue it:",
Hebrews 1:1-14 "God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;..... But unto the Son he saith..... Thou, Lord, in the beginning hast laid the foundation of the earth; and the heavens are the works of thine hands:.....",
John 17:5-24 "And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was..... for thou lovedst me before the foundation of the world.",
John 8:58 "Verily, verily, I say unto you, Before Abraham was, I am.",
Genesis 2:7 "And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.",
Revelation 19:16 "And he hath on his vesture and on his thigh a name written, KING OF KINGS, AND LORD OF LORDS.",
Ecclesiastes 5:9 "he who serves the field is king.",
Mark 10:45 "the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.",
Acts 4:10-12 "Jesus Christ of Nazareth..... whom God raised from the dead..... This is the stone which was set at nought of you builders, which is become the head of the corner. Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.",
1 Timothy 2:5 "there is one God, and one mediator(also: one Lord/Christ) between God and men, the man(i.e. the (be)souled being) Christ Jesus;",
John 14:6-31 "Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me..... he that hath seen me hath seen the Father;",
1 Corinthians 8:4-6 "As concerning therefore the eating of(i.e. as for the act of following/practicing) those things(i.e. those spiritual/religious things) that are offered in sacrifice unto idols(or: that are unrighteous), we know that an idol is nothing in the world, and that there is none other God but one. For though there be that are called gods, whether in heaven or in earth, (as there be gods many, and lords(also: and christs) many,) But to us(i.e. but actually the truth applying to all humans of the universe is such that) there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.",
John 13:13 "Ye call me Master and Lord: and ye say well; for so I am.",
Hebrews 9:24-28 "Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us: Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others; For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself. And as it is appointed unto men once to die, but after this the judgment: So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.",
Revelation 19:9-10 "And he(i.e. that highest/greatest Saint/Angel) saith unto me, Write, Blessed are they which are called unto the marriage supper of the Lamb. And he saith unto me, These are the true sayings of God. And I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus(i.e. of the only (true) Lord): worship God(i.e. That Who really is the true God): for(i.e. because only) the testimony of(or: the Spirit that comes from) Jesus is the spirit of prophecy(i.e. the true prophecy).",
1 John 2:22 "Who is a liar but he that denieth that Jesus is the Christ(i.e. that Jesus is the only (true) Christ/Lord)? He is antichrist, that denieth the Father and the Son.",
John 10:8 "All(i.e. all lords(christs)) that ever came before me are thieves and robbers: but the sheep did not hear them.",
Matthew 24:5-24 "many shall come in my name, saying, I am Christ; and shall deceive many..... if any man shall say unto you, Lo, here is Christ, or there; believe it not. For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect."
Blessings
