What do you mean they?
Do you realize how many millions and millions of Jews that have lived in the last 2,000 years?
The ones alive when Christ returns will be an extremely small % compared to all the others.
The Jews have no special place compared to Japanese or the Dutch.
The question is,what did Paul mean in Romans 11? That is ll I have to say for now...
Check this out
http://www.amazon.com/Future-Israel-Anti-Judaism-Challenged-Commentary/dp/0805446273
http://www.futureisraelministries.org