As of right now, I have decided to become Christian. The reason I can be this is because I believe the message of Jesus was a wondrous and beautiful message indeed. And I would like to follow it. So as a Christian, my first goal is to understand Jesus more than ever before. Is that not what all the disciples did? I would like to become more like them. And so to better understand Jesus I would like to see things more from his point of view. Now the new testament offers a pretty good view of this. So when I hear that Jesus said that the old laws are still in effect I see who he was talking to. He was talking primarily to Jews and not me. And that is good for me to know so I can now forget about the old testament and focus on the new. The old is just there to be viewed from an historical perspective. So am I not now a Christian but perhaps of a different denomination? Now I am beginning to wonder if this denomination already exists?
It looks more like you've misunderstood Jesus on that point. While there are a few churches that essentially view the Old Testament as not their primary source of guidance, all the rest view the New Testament as establishing what elements of the Old are retained and which have been superseded by Christ's sacrifice.
Let's examine if Jesus really said that message that was seemingly directed towards the Jews for being Jews. Do pay particular attention to verse 19 in context of what Jesus is saying.
Matthew 5:7 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. 18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
19 Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven. 20 For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
So how can one break one of these least commandments and teach men so STILL be in the kingdom of heaven even though he shall be called least in the kingdom of heaven?
2 Timothy 2:10-13 & 18-21 also adds to the conundrum.
2 Timothy 2:10 Therefore I endure all things for the elect's sakes, that they may also obtain the salvation which is in Christ Jesus with eternal glory. 11 It is a faithful saying: For if we be dead with him, we shall also live with him: 12 If we suffer, we shall also reign with him: if we deny him, he also will deny us: 13 If we believe not, yet he abideth faithful: he cannot deny himself.
Addressing the former believer now....
8 Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
Now addressing former believers and believers engaged in iniquity...
19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, let every one that nameth the name of Christ depart from iniquity. 20 But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour. 21 If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work.
How can even a former believer still have Jesus in them and yet God is still calling that former believer and those that believe to depart from iniquity which will result in purging that sinning believer from being a vessel unto dishonour in His House TO being a vessel unto honour in His House? ( * Which begs the question how can a former believer or a believer engaged in iniquity be in His House even though he is a vessel unto dishonour if he did not repent? )
Could it be that once any one believes in Jesus Christ, even in His name, the foundation that has been laid is unremoveable regardless of what a believer build on that foundation that denies Him?
And yet the consequence is death which is the destruction of the body which is the temple of the Holy Spirit. For sake of a shorter post; see links for 1 Corinthians 3:10-17.
https://www.biblegateway.com/passage/?search=1+Corinthians+3:10-17&version=KJV
We look at the church at Thyatira testifying to God acknowledging them as His and yet unless they repent, they will be cast into the bed of the great tribulation at the pre tribulational rapture event to be killed with death in Revelations 2:18-29 at the link below for not being found abiding in Him & His words as His disciples by His grace & by His help as hinted at John 15:1-9 following that Revelations reference link below.
https://www.biblegateway.com/passage/?search=Revelations+2:18-29&version=KJV
https://www.biblegateway.com/passage/?search=John+15:1-9&version=KJV
This would explain why God is judging His House first as stated in 1 Peter 4:17-19 and why Jesus was giving warning to believers about the risk of being left behind for not being ready & found abiding in Him & His words as kept in the KJV as His disciples as one such warning was given in Luke 12:40-49 at the link below.
https://www.biblegateway.com/passage/?search=Luke+12:40-49&version=KJV
Even Psalm 89 at this link below hints towards the promise of the New Covenant where God says the rebellious are still His since Jesus will lose nothing of all the Father has given Him since He as fulfilled the requirement of the law by His righteousness alone.
https://www.biblegateway.com/passage/?search=Psalm+89&version=KJV
John 6:38 For I came down from heaven, not to do mine own will, but the will of him that sent me. 39 And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
That is why the vessels unto dishonour that did not look to Jesus for help to depart from iniquity before the Bridegroom comes, will be in His House, albeit, to be gathered later on after the great tribulation as a testimony to the mercy of God and His power of salvation for any that believe in Him, even in His name.
John 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: 13 Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
So Jesus wasn't talking about how the believing Jews are under the law, but how His righteousness fulfills the law that surpasses the righteousness of the Pharisees ( which are filthy rags by the way ) so that if a believer breaks one of His commandment and teach others so shall be called the least in the kingdom of heaven.
Course, I bet the prodigal son, although still son, will wish he had not given up his inheritance for wild living like Esau did in his giving up his birthright for something temporary like a meal as there will be weeping and gnashing of teeth over that loss.
Being forever a vessel unto dishonour in His House would require God wiping the tears from the eyes of those saints coming out of the great tribulation to get past that loss of not having that place in the city of God to live in as well as for not trusting Him as their Good Shepherd for help to be abiding in Him so as to attend the Marriage Supper.