Maybe to spark curious conversation, when a world power seems to be supportive of actions that an international body considers negative, what structure can help resolve these? It does seem like UN is unable to really make a dent here.
If the latest Gaza war taught us anything, is that UN is powerless. And, unfortunately, it is the highest entity that could apply leverage here, so... Not much we can do. In the long term I hope other nations realize they are very vulnerable and begin to invest more in defense, but that escalation can have other downsides.
What is the lowest entity that can apply leverage? Regardless of what US or UN does or doesn't, you can start boycotting today.