Everyone who has spent the last six months organizing, protesting, harassing zionist ghouls, and calling out Genocide Joe has a part in this. The US would never, ever allow something like this to pass without the large, persistent, and threatening popular movement that has demanded a ceasefire and Palestinian liberation.
Yeah, so looking at the permanent members. The US ain't doing shit. The UK is the US but useless. The French might be keen but probably not and are preoccupied with the Beret Confederation. Russia would fucking love to but is a little busy right now.
Which leaves China, who generally adopt a non interventionist approach and might not have the power projection.
And then there are the minor members, who are particularly useless right now, with the only substantial militaries being the ROK (no) and Japan (would be funniest option, but no)