The biggest threat to American Jews come from the ultra-secular non-orthodox Jews. In American they are perhaps 1% of the country, but even where they are important locally their ability to make mischief (e.g. ban bris milah, ban yeshivos, punish Jews for not support “gay rights, etc.”) is limited by America’s constitution and tradition of “rule of law”. In Eretz Yisrael, secular Jews are the majority, and their quasi-constitution as interpreted by the zionist courts is devoted to “freedom from religion”.
Even with Democrats in charge, America is in no danger of being overrun by its enemies or of being destroyed. Medinat Yisrael exists only for so long as the Muslims keep fighting each other – if they unite then Israel would be unlikely to survive. Remember two or three well placed nuclear bombs would wipe out most of the population of Israel.
If you take into account that Israel is 1/40 the size of the US, terrorism and crime in Israel are far more dangerous and disruptive than in America.