All of the US political establishment is strongly pro Israel. I think it's fair to say they have gotten a lot of blood in their hands in the process.
Even so, before the October 7 attacks, relations between the US and Israel were pretty much at an all-time low. Netanyahu is Trump's man. Since the attack however, Biden has pretty much given Netanyahu a carte blanche. At least that's how it appears to the public.
Of course Israel is and always has been problematic in its own right. It is however still important to keep a distinction between Israel and the dangerous extremists that run the country. Netanyahu is closer to Yigal Amir than he is to Yitzhak Rabin, and there are a lot of Israelites who recognize him as the genocidal extremist that he is.
I expect nothing other than support for the state of Israel from an US president. That's a given at this point. Support for Netanyahu, however, I expect only from his fellow fascists.
It's not a lack of guts that has him enacting a genocide, he agrees with Netanyahu. This man is a life-long white supremacist with a well documented history of open racism.
If we ignored his holocaust of the Palestinians we'd still have his war in Ukraine, his slave camps (although granted that's a general American feature ), his numerous sexual assaults, his killing of over a million of his own citizens via covid response incompetence, his broken election campaign promises, his other mass murders around the globe...