God created Adam, then with Adam's rib he created Eve.
Yep. Genesis 2:21-25.
Yep. Genesis 4:1-2.
but when Cain killed Abel and went to wander the Earth he was fearful of people killing him.
Yep.
Gen 4:14 Behold, thou hast driven me out this day from the face of the earth; and from thy face shall I be hid; and I shall be a fugitive and a vagabond in the earth; and it shall come to pass, that every one that findeth me shall slay me.
Gen 4:15 And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD set a mark upon Cain, lest any finding him should kill him.
Gen 4:16 And Cain went out from the presence of the LORD, and dwelt in the land of Nod, on the east of Eden.
Gen 4:17 And Cain knew his wife; and she conceived, and bare Enoch: and he builded a city, and called the name of the city, after the name of his son, Enoch.
So what I'm seeing here Adam and Eve were the first from the messianic line, the rest were gentiles.
Nope.
Who were the other people? Adam's and Eve's other children:
Gen 5:3 And Adam lived an hundred and thirty years, and begat a son in his own likeness, after his image; and called his name Seth:
Gen 5:4 And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:
There were no other human beings around other than the children of Adam, for the scripture says, that Adam is the "first" man, and even the Hebrew (OT; Genesis) speaks in the definite article "the man" or "the Adam":
1Co_15:45 And so it is written,
The first man Adam was made a living soul; the last Adam was made a quickening spirit.
There can be no other human beings around, at that time, for notice God's actions and questions to Adam in regards a wife, an "helpmeet":
Gen 2:18 And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
Gen 2:19 And out of the ground the LORD God formed every beast of the field, and every fowl of the air; and brought them unto Adam to see what he would call them: and whatsoever Adam called every living creature, that was the name thereof.
Gen 2:20 And Adam gave names to all cattle, and to the fowl of the air, and to every beast of the field; but for Adam there was not found an help meet for him.
Why was an "helpmeet" needed to be created from Adam's rib, if there were other people already around? Why create more animals in front of Adam in the garden, and bring them before Adam?
The woman, "Eve" is even called the "mother of all living":
Gen 3:20 And Adam called his wife's name Eve; because she was the mother of
all living.
Not some living, but "all" living. The scriptures further confirm this by saying:
Act_17:26 And hath made of
one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
If not, then what you have is "racism" among humans. Differing "races", but the scripture says there is onlya single race of mankind, stemming from Adam, see the geneaologies in scripture.
From studying other ancient religion there were Zoroastrians, Egyptians, and Hindu around the Earth as well.
Not so. Most of the ancient chronologies are based upon the faulty (and greatly expanded) Egyptian, which has been shrinking in 'time' ever since it was first postulated, the further the archeology has uncovered.
Egyptians (then), came from the descendants of Noah, the children of "Ham".
Gen_10:6 And the sons of Ham; Cush, and Mizraim, and Phut, and Canaan.
1Ch_1:8
The sons of Ham; Cush, and
Mizraim, Put, and Canaan.
Gen 10:32 These are
the families of the sons of Noah, after their generations,
in their nations: and
by these were the nations divided in the earth after the flood.
Mizraim are the Egyptians (then, today they are basically of an Arab (through Arabian conquest, and a mix) descent).
Psa_78:51 And smote all
the firstborn in Egypt; the chief of their strength in
the tabernacles of Ham:
Psa_105:23 Israel also came into Egypt; and Jacob sojourned in the land of Ham.
Psa_105:27 They shewed his signs among them, and wonders in the land of Ham.
Psa_106:22 Wondrous works in the land of Ham, and terrible things by the Red sea.
At the Tower of Babel, the "nations" (Gentiles) were split, for before the whole world was of
"one language":
Gen 11:1 And the
whole earth was of
one language, and of one speech.
Gen 11:2 And it came to pass, as they journeyed from the east, that they found a plain in the land of Shinar; and they dwelt there.
Gen 11:9 Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and
from thence did the LORD scatter them abroad upon the face of all the earth.
So Adam and Eve were the first Jews but not necessarily the first humans in a sense?
Neither Adam, nor Eve were "Jews", of the lineage of "Judah", a son of Jacob/Israel, a son of Isaac, a son of Abraham ... a son of Noah ... a son of Adam.
Even Abraham was not a "Jew", but "Hebrew" of the lineage of "Eber":
Gen_14:13 And there came one that had escaped, and told
Abram the Hebrew; for he dwelt in the plain of Mamre the Amorite, brother of Eshcol, and brother of Aner: and these were confederate with Abram.
Gen_10:21 Unto Shem also, the father of
all the children of Eber, the brother of Japheth the elder, even to him were children born.
There were no other lineages of humanity, other than the progeny of Adam, Eve. Even the Flood of Noah is a delineation marker, all mankind today are related to Noah, related to Adam.
The word "gentiles" just means "nations", and so see Genesis 11.
Gen 10:5 By these were
the isles of the Gentiles divided in their lands; every one after his tongue, after their families, in their nations.
That is the first time it is used in all of scripture.