There is no male or female in the kingdom, either, yet here we are male and female.
There are also still "bond" and "free" people as well in this world. But that isn't quite the point. God doesn't give any significance to any of those classifications. I am not a Gentile. Neither are you. God does not regard the inhabitants of the world as being divided into Jew / Gentile categories anymore. That is why He got rid of the genealogical records of the Israelite tribes in the AD 70 fires that burned up Jerusalem's archives. God didn't want those classifications to have any distinction for us under the New Covenant. Paul called those "endless genealogies" both
"unprofitable and vain" (1 Tim. 1:4, Titus 3:9).
As to the tribulation not being duplicated.....that part of the prophecy might be referring to the very end.....sometimes can be a kind of woof and waffle to prophetic words, which are speaking in spirit......might be speaking of more than one thing at the same time. I think we can depend on it that the end of the world is not going to be very nice at any rate.
But the "Great Tribulation" in Judea was
NOT going to take place at the "end of the world". That is because there would continue to be periods of tribulation for the believers even AFTER the Great Tribulation. None of those
subsequent periods of tribulation in history would ever duplicate that of
the former "Great Tribulation" period in Judea - "no, nor ever
shall be"(Matt. 24:21).