The idea that, even if this were the sort of things that can be established rigorously (which it's not), it would automatically follow from it that unconditionally supporting Israel's war was in the US interest, as if terrorism were the alleged effect on terrorism were the only relevant consideration here, is absolutely preposterous.

But whatever that is not even my point. My point is that evidently American conservatives don't even think of it in terms of the US national interest.

They only make this kind of arguments when challenged. It's clear that they see "standing with Israel" as some kind of moral duty.