Israel is currently blockading Gaza, starving the civilians and denying them medical care. So the US could send them some aid - just food, medicines, water purifiers and so on, nothing that could even be misinterpreted as a weapon - on an aircraft carrier. Distribute it directly to civilians. Oh, and while they’re there, arrest any Hamas fighter who tries to interfere, and turn them over to the Israeli courts. Help the people, humiliate the extremist leaders on both sides, and show voters in both countries that a peaceful solution is possible and desirable.