From most polls I've seen, the US public still generally backs Israel. Crucially, the voting public who, unlike our loud and demonstrative progressive wing, actually shows up to vote, tend to support Israel.
And we had options to help, it just required us to vote in the primaries (2016, 2020) despite not being a tik tok trend or whatever. Sanders wanted to cut military spending but the online and very vocal progressive wing didn't show up and vote for him.
It's sort of like not staying fit, eating poorly and not sleeping well and then wondering why you got hurt when you tried to play a sport with your healthier friends. These things take work/showing up well before they become a critical issue.