There has been a concerted effort to tie Jewish identity to the modern state of israel. It certainly doesn't help that the birth of said state came in the wake of the Jewish people nearly being wiped out by an industrialized genocide. Add to that the previous 1000 years or so of systematized antisemitism and it's easy to see why the proposition can be very appealing to a Jewish person who had (and sometimes still has) very material reason to fear for their safety.

This was leveraged (some might say exploited) by unsavory actors in the creation of a reactionary, settler-colonial ethno-state. This should not be too surprising, given that zionism arose in the same sociopolitical milieu that gave us modern nationalism and pan-nationalist ideologies.