While there is arguably still some influence from democratic pressure on some areas of US Federal policy, foreign policy and warmaking (including financial warfare like this) are not among them. These have been insulated from public opinion since approximately the the 1940s. It took a massive organization against the draft to (arguably, possibly, maybe -- we'll never really know) shorten the Vietnam war (which, incidentally, was never declared a War by the democratically elected Congress), and that was the high water mark of democratic influence on the security state since WW2.

In short, the opinion of Americans is just not relevant to America's foreign policy decisions. Even a 100% anti-Zionist Congress would be unable to stop supporting the genocide.