They are not... all Jews. The idea that only Jews are Israelites today is a tradition of men. Only 3 tribes out of all the tribes were known as Jews historically (Judah, Benjamin, and Levi). The rest of the tribes were not ever historically known as Jews. Assigning them as Jews is a political agenda from men.
Actually in regards to Rev 7, all Jews are Israelites, but not all Israelites are Jews. I understand the technicality here. Jews only come from Judah, interestingly, the first tribe mentioned in Rev 7:5 is Judah. How about we use the same term the Bible does, Tribes of Israel?
[sup]
5 [/sup]From the tribe of Judah 12,000 were sealed,
from the tribe of Reuben 12,000,
from the tribe of Gad 12,000,
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6 [/sup]from the tribe of Asher 12,000,
from the tribe of Naphtali 12,000,
from the tribe of Manasseh 12,000,
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7 [/sup]from the tribe of Simeon 12,000,
from the tribe of Levi 12,000,
from the tribe of Issachar 12,000,
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8 [/sup]from the tribe of Zebulun 12,000,
from the tribe of Joseph 12,000,
from the tribe of Benjamin 12,000.
Then in Rev 14:3-5 we see their pedigree,
[sup]3 [/sup]And they sang a new song before the throne and before the four living creatures and the elders. No one could learn the song except the 144,000 who had been redeemed from the earth. [sup]4 [/sup]These are those who did not defile themselves with women, for they remained virgins. They follow the Lamb wherever he goes. They were purchased from among mankind and offered as firstfruits to God and the Lamb. [sup]5 [/sup]No lie was found in their mouths; they are blameless.