You just want to absolve yourself of that moral responsibility.
That’s exactly what you are doing. You’re focusing on this one issue, retreating yourself from the binary decision because neither options stands for what you (or I, or morality) would prefer. Completely ignoring that withdrawing from the choice plays into the hand of the infinitely worse candidate. So by not choosing, you do nothing to stop the situation in Gaza, but might actually make things a lot worse for people all over.
You can virtue signal that you did not compromise on your believes, while actually helping your country make a worse place.
By not voting, you are still, implicitly, voting for the candidate who you wouldn’t have voted for. Do you think he’s not supporting Israel?
Do you think he even has any moral standing?
That’s who you’re voting for by not voting.