Pretty sure he would (try to) avoid prosecution and ask for asylum in the US. If that doesn't work he might prefer lifelong imprisonment at The Hague rather than the ultimate fate of Adolf Eichmann.

Here's what Grok is saying:

Realistic Scenario: Given these complexities, if Netanyahu or any similar figure were to flee to the U.S., they would more likely face political asylum or protection rather than immediate prosecution under U.S. law for genocide, unless there's a significant change in U.S. policy or overwhelming evidence leading to an unprecedented legal action.