The American government, even the Democrats, are friendlier to yiddishkeit than the Israeli government. In fact, there are no ultra-secular parties – even the “secular” Democrats at least pretend to be pious believes who support accomodation of religious minorities. The entire culture of American since the latge 18th century has been exceptionally supportive of religious minorities – as opposed to the current regime in Israel which even has a national anthem on hwo they strive to build a land free from the yoke of Torah and Mitsvos.
And even with Obama stripping the Defense budget to fund his pet projects, America is a lot stronger than its enemies – and keeps its enemies far away. If The Arabs ever united, especially in including the other major Islamic powers (Turkey, Pakistan and Iran), Israel would not last long. As it is, they have survived largely through American protection (which is probably ending).
There is also no shailoh of leaving Eretz Yisrael in order to focus on Torah and Mitsvos. When Eretz Yisrael is run by evil people trying to destroy Torah, we should flee to the midbar, and Midbar America is a pretty nice place to flee to.