Most western a world governments don't fund Israel and yet people there seem to "care" a lot. I don't think your argument holds water. Many western governments trade with Iran and support the oppressive regime there in direct. The US also funds Egypt which is another oppressive regime where there's no human rights. It supports Saudi Arabia that chops up journalists.

Your logic doesn't hold because it never held. The reason people "care" about Palestine is that they've been manipulated to care.

The logical thing would be for the American population to stand with Israel when it's being attacked. That would be the normal default. Like the rest of the world supported the US when it was attacked on 9/11. What we're seeing is the collapse of logic and truth and the win of propaganda campaigns and lies.