There are so many plausible explanations that make more sense than yours, but I’ll happily give you one:
The US has interest in a strong ally in the Middle East. They have massive companies—literally some of the biggest—that pretty much are “the economy” that all have interest in seeing war happen, because they sell weapons. It’s not about what’s right. It’s about what’s prudent for US interests. Money, power. It’s really not that complicated.
There isn’t a cOnSPiRaCY here. It’s fucking capitalism and geopolitics. They’re both horrible, murderous games, and the US is at the top of both, but the sands are shifting. You think this is bad? They’ll do much worse if the foundations crumbles beneath them any further. I feel like I bring this up every time someone seems baffled by Biden/democrats supporting Israel. It’s the country that’s in bed with Israel. Not Biden. Trump may seem like he “doesn’t play by the rules,” but that’s just because he doesn’t know them. But his greed and hatred would see him be 10x worse on Palestine. So buckle up, people. It’s all bad.