The reason is simple:
Liberal American Jews are Liberals before they are Americans, and before they are Jews.
Liberalism takes precedence over anything else.
i think the jews' infatuation with liberalism has little to do with religion and a lot to do with the the depression era mentality which makes republicans anathema-there are numerous exceptions-as a jew the only 2 jews in congress who would ever get my vote are norm coleman and eric cantor-cantor is dead set against the un and gets a high rating from both the nra and goa-and a low rating from the aclu-my kind of guy-coleman is similar-i wouldn't vote for a pos like nadler or schumer,etc,etc if a gun was held to my head-even though jews are generally well educated a lot of them are hidebound by habit and won't stray from the narrow minded path of liberalism-even when they are voting against their own interests-justice ginsburg showed up at an historical synagogue in rhode island and got fawned over like you wouldn't believe- i am surprised the building didn't collapse from the presence of this little atheist gun grabbing baby killing bitch-even most jewish republicans in rhode island who held office have been gun grabbing women like nancy mayer and lila sapinsley-RINOS to the core-we did have a jewish attorney general,jeff pine who was excellent on gun rights and also pretty conservative-he got fed up with politics and didn't run again-he was replaced by a white anglo-saxon empty suit fop named sheldon whitehouse(!!)who is now a us senator and still a limousine liberal empty suit-in conclusion i think a lot of jews just don't want to look at alternatives to the disgusting left wingers running the dimwit dem party-i will never understand-btw i am NOT a neocon-i was right wing over fourty years ago in high school and am a proud member of the John Birch Society,VFW,and NRA
Nonsense, liberals are Americans. That arguement won't win many over.