Yet all of humanity does not become Christian. The final rebellion occurs at the end of the 1,000 yrs.
Yes, and to be precise, no one in the Millennial becomes a 'Christian' nor in the Tribulation for that matter.
People cease becoming Christian after the Rapture.
People return to being either a saved Jew or Gentile, but the term Christian is for those who have become part of Christ's body and His Bride.
You mean no one after the rapture follows Jesus Christ? Do you have a text to support your theory, Thou Quibbler of Terms?
It may just be semantics (we do a lot of that here), but why wouldn't the Jews and Gentiles who realize that Jesus is the Christ and believe in him be Christians. Also, during the 1,000 yr reign not everyone is a believer, but I'm assuming some become believers, wouldn't they also be Christians.