This is begging the question, a form of bad faith: You are asserting something as true then asking why it is so, rather than asking IF it is true.

Delete and try again.

Can't tell you about the first half of your question as I'm not familiar with the American doctrine.

And before someone jumps into discussions: I'm relying knowledge, not conviction - if you have more insights, please add them. But if you try to convince me that it's wrong or try to point out inherent inconsistencies: you'll add nothing for me - preaching to the choir and so on ...

the second part is actually straight forward: Jews in the Bible didn't believe in JC either - by definition.

The reason why the Jewish faith has a special role for Christians lies in the old testament, not the new one: they are "God's chosen people" and everything resolves around then bring pampered by God, both in the positive sense as the favorite but also in the negative sense as the one's who receive the stick more.

Speculation part: This unique position is very present to all Christians, but especially the more fundamental ones. Combine this with a history of mistreatment, where jews were blamed for everything that went wrong in your neighborhood and you have a good mix of the enduring, suffering chosen ones.

Note: Israel as state is then a completely different discussion.

mahn its best not to discuss fantasy/imaginary rules as they are not based on any respectable logic whatsoever.

you will make no progress when dealing with any imaginary sky being and their constituents, so best not to bother.

Because spades reversed the unexpected monopoly.