Up until the last election, Israel was a tremendous supporter of learning Torah (even if it was done as part of a political deal rather than out of love of Torah). Israel also has been great for frum publishing (suggesting we should aspire to disband the IDF and give the money to Mossad ha-Rav Kuk and the other Torah publishing houses – we’ld all be better in the long run). If you are the equivalent of “modern orthodox”, its great for Yiddishkeit and having a secular career (America has hassles for “conservadox” or frummer, Israel only has hassles for those frummer than the kipad srugah crowd).
How much impact Israel would have had on the holocaust is questionable. If the British, French and Dutch empires (at the time huge, globe encircling empires upon whom the sun never set) couldn’t stop Hitler, its doubtful we could have made a difference. And a very good argument can be made that the reason the British blocked Jewish emmigration from Europe was to keep the zionists from going to Palestine (i.e. if the hareidim and De Haan had prevailed in making peace with the Arabs, there would not have been any attempts by the Brits to keep Jews from fleeing, and most European Jews would have ended up safely elsewhere, though only the fanatics would have preferred Eretz Yisrael). And in all fairness, American opposition to holocaust rescue was based on the fear that most Jews would be socialists and communists, and if not left wing radicals, they would be frum which to Reform Jews was just as bad (Reform Jews then were both very anti-socialist and anti-frum — and were politically the dominant group in the Jewish community, and led the opposition to holocaust rescue plans).
If you are really concerned about goyim trying to wipe out the Jews, you should favor having Jews widely distributed in many different countries, or perhaps should consider space exploration (something the Americans looked into to solve the “Jewish problem” – but not workable in the 1940s). As it now, nukes on Jerusalem and Bnei Brak would be devasting to the frum community. Of course you could trust Ha-Shem to protect us, but that would make you a hareidi fanatic.