I'm all for giving aid to Palestine, but I think you are being a bit reactionary here.
Seriously, let's imagine that you had half a billion in military aid for Palestine ready to go. Who would you send it to?? What is this money actually being spent on?
The Palestinian people are effectively prisoners of Israel right now. If we just hand them a bunch of weapons, Israel will just go steal them. If we sent them tanks and shit, we'd also have to send soldiers trained to operate that equipment, support staff, etc... and then we're past the point of "sending aid" and we're just prosecuting a war with Israel on Palestine's behalf. Not that i'd be opposed to that, per se, but you see how that platform would be pretty much untenable and unelectable, right?
Ukraine is at war with Russia. Palestine is occupied by Israel. These are fundamentally different scenarios and we can't pretend they have the same solution, even if we wish they did.