Considering that reality, does it not make sense that Americans would be more vocal when it comes to this conflict, because we actually have agency to affect it?
I genuinely want to know what your response is to that argument, because it's not a new one, and seems very obvious to me.
The United States is far and away the Saudis' most important and pivotal ally. We almost single-handedly ensure their security and and diplomatic standing. Now, many believe the "side causing excessive suffering" in that conflict is actually the Houthis. I would be interested to know if you fall in that camp, while (it would seem) not feeling the same way about Hamas, as that would do a better job of making my point than I could ever do on my own.
Beyond that, the Houthi / Saudi conflict is a lot less asymmetric, which I think plays a factor in people's response to it. The Houthis have more territorial control, weapons, agency. It's closer to a state-state war. Gaza is quite literally boxed in--air, sea and land.
If you're actually interested in the geopolitics of this I suggest you just spend some time tonight reading about these relationships and their history.
I do think there are particular aspects about US support for Israel, outside of humanitarian concerns, that lead to people being more critical about US involvement in the conflict.
Well, yes. If someone doesn't like Jews (and many many many people do not), that is the only "particular aspect" they need. The one good thing about antisemitism is that it's been around for so long that it's pretty easy to spot, even when the bigots try to swap some of the terminology around.