First of all, there is no "compromise" between "genocide palestinians" and "don't genocide palestinians."

the plurality of 18-29 year olds, that is, the only group of people who supported sanders in his primary bids are also the group most likely to be against israel's genocide of palestinians. with whom does he gain "political capital" by supporting israel? People who never supported him in the first place. with whom does he lose "political capital?" The people who supported him. Anyway I hope someone more sophisticated than me in the art of rhetoric and more patient in the art of education is able to exorcise your brainworms with respect to liberal "compromise" politics.

Just saying no to everything for ideological reasons alone is what the Republicans do, and we have seen how effective their governance is.

The republicans and the democrats both support israel, both support war against china, both support NATO expansion, both support capitalism, both support imperialism, both support racism. Demokkk-rats just do it more politely. They drive the car off the cliff at 90 miles an hour instead of 100 miles an hour. They drone strike the children instead of sending roided up marines to do it in person. Oh, and they have slight disagreements with their republican colleagues on matters of priority, like whether China or Russia is a bigger threat, but not on fundamentals.