To put this another way, everybody from all time, from every era, from the beginning of time to the end, is judged at the end of time by Christ alone.

We are judged with Adam and Eve, Moses, and all the apostles. Our entire ancestry and our entire lineage. All our enemies, and all our friends.

All people of all lands and all ethnicities and all ages are judged at once, and nobody has a way into God's kingdom by going around Christ's judgment seat.

It is reasonable to deduce that everybody in heaven are Christians, even those who lived before Christ, because heaven is an event that takes place at the end of the time.

Covenental Jews are not already in God's kingdom, and then at some point have to accept a new king (Christ).

No: we all encounter judgment at the same time. Jews in covenent with God who encounter Christ in judgment, the King of the Universe, will know him as God and accept salvation, and those who don't will not enter God's kingdom.

#ToChristAlone