If you concentrate on certain people, you will end up in circles. I'm talking about hating Jews because they are Jews. There are many Gentiles that will be entering Hell along with some Jews. That doesn't mean Israel is not God's people. Israel is God's time clock. The future will be determined with what happens in Israel. That doesn't mean Jews won't be judged. Look at the fate of leaders that tried to divide Israel's land for peace. They all died horrible deaths.
I don’t understand your soteriology at all. It flies in the face of traditional Catholic or Protestant teaching, veering into a sort of special pleading that allows you to feel better about the prospects in the hereafter for a group of people you like.
A man may reject Christ and still be saved, so long as he’s a Jew? That’s interesting. That is what you are saying; essentially, that there is another pathway to salvation that is outside of Christ. You also seem to be saying that Christ is the pathway to salvation for Gentiles, but the earliest Christians were Jews who converted. Why did they bother? They didn’t need Christ.
You have been presented with the question of salvation through conversion to Judaism, and you have avoided it. You also avoided John 14:6. One is a pretty straightforward question, the other is Scripture. The Scripture answers the first question for you.
“The future will be determined with what happens in Israel.” No, the future will be determined by God’s will, not by interpretations of prophecy that got really popular in the last 50 years.