When we look into History we see that Muslims have always helped Jews and come to their rescue even putting their own lives at stake to help others, because this is what Islam teachs us to do.
"...And whoever saves a life - it is as if he had saved mankind entirely. Quran 5:32
Not to mention that Jews were prosperous when Spain was ruled by the caliphs....and were forcibly converted to Catholic or expelled following the Reconquista