I think domestic politics are certainly a factor, but not a big one in an ICC case, because Americans, to a first approximation, do not give a shit about the ICC; further, we aren't a party to the ICC, so it's not as if the administration is being asked to do something or help adjudicate.
I want to say again that I think this particular case is well-founded. But an ICC warrant against the leader of a non-signatory is fundamentally a political act, and while I don't take issue with the stated intent of that act, I don't get the theory of change behind it.
I put it to you directly: what good comes of this while Netanyahu remains in power?
It would if Israel has any sense of self preservation at all. They need the support of the American government more than they need Gazan land.
(I also think it's not at all clear that serious policymakers in Israel "want Gazan land", let alone need it; the messianic nutballs bolstering Netanyahu's coalition are, to put it mildly, not representative of mainstream Israel policy thinking.)
A reminder that we're just talking about this stuff here; this is HN, not the UN Security Council. If we're going to have threads like this here, we're going to have to accept that we're having curious conversations, not high-stakes deliberations. So: I can be wrong about all of this stuff, and I'm glad to hear why. But we're not going to solve Israel/Gaza on a thread.
(You didn't say anything to prompt that disclaimer, it's just a stress reaction from previous threads).
Or just make them themselves. That seems fully within their capabilities if push comes to shove. After all, we are talking about bombs not fighter jets.
Being able to purchase weapons from the US also gives them significant political latitude internally. When a significant amount of your economy and government spending goes to making weapons, you're going to affect domestic budgets, which will make coalition building much harder especially in a country with as many small parties as Israel. We see this in Russia as well but because Russia is not democratic when it comes to defense allocation, it simply throws its dissidents in jail or encourages them to leave.
And yet are regularly re-elected. And have been for decades.
Reagan did it with a single phone call: https://www.nytimes.com/1982/08/13/world/reagan-demands-end-...
(I kind of like Bush 1, at least as a competent operator with some discernible principles, and think Israeli settlement of the West Bank is abhorrent).