Honestly it is completely normal for the US to veto these actions against Israel. Basically for anything to get through the security council it has to be targeting some one who is not friends of one of the 5 permanent members; The USA, The UK, France, China, and Russia. So that happens almost never. By the way the permanent members were all the counties that had atomic bombs at the time of formation. Not that is relevant to this discussion but a great little mind fuck factoid.