Keith – The phenomenon of “progressive except for Palestine” has been well observed, but “progressivism” per se is essentially the left wing of capitalism, rebranded. In leftist communities there is a less well documented inverse, “anti-imperialist on Palestine only”. Most Trotskyist organisations (including, in America, the ISO, the DSA, the PSL and many others) oppose the US imperial position on Palestine, because it’s an easy and cost-free position to take—any putatively socialist organisation will have very few people who benefit from settler-colonialism in Palestine or who buy into the Zionist narrative—but otherwise either are completely ignorant of foreign policy, or follow the US line to the letter.
Thus we have DSA-endorsed politicians like Alexandria Ocasio Cortez and Ilhan Omar who support the imperial destruction of and wars against Venezuela, Iran, Nicaragua, Cuba, Libya, Somalia, North Korea etc, and who parrot the imperial line about e.g. fake concentration camps in China, or the CIA-sponsored “Syrian Democratic Forces” being anything other than an attempt to balkanise the Syrian state along ethnic lines. One suspects their only reason for supporting Palestine is out of a belief that a future Palestinian state would support US imperial interests better than Israel does today.
As for the “Jewish community”, if they hold leftist views on any subject it’s probably a consequence of being wealthy and university educated. As such, Israel is easy for them to denounce, because the purpose it serves in American imperialism is to enrich arms manufacturers, technology executives and private prison owners, all of which are “other people” whose activities rarely affect the average leftist American Jew. American imperialism towards Iran and Venezuela, on the other hand, serves to uphold American energy interests, and ending that imperialism would result in higher oil prices and therefore less comfortable lives for leftist American Jews. People, Jewish or otherwise, leftist or otherwise, are fundamentally self-interested.