I saw another post responding to your question, "What about the Jews?"
The response was --- well, they go to Heaven just because they are the chosen people.
I hope this is true (as a Jew who converted to Christianity worried about my kinfolk), but I don't think it is Biblically the most safe answer.
The Jews, are, of course heirs of Abraham and the promise. No doubt about that. Theologically, Chrisitans are heirs to that promise by being adopted into the family.
BUT, Paul (and Jesus) talked at length about how quick God was to break off branched from the vine . . . that is, reject Jews who failed to accept Christ.
So opinions differ.
I had one "Born Again" Christain once tell me...
"In the end (I guess he means the end of times?) we all become Jews".
I think he was refering to those who accepted Christ as their Lord and Savior when he said "All".
This was after I had asked him what happened to the Jews since they didn't believe in Jesus.
Exactly - and all opinions don't carry equal weight.
Here's a weighty one, WELL argued: