The USA went through intense diplomatic efforts, guys, in the last few days before their attack on Iraq in 2003 to get the UN to endorse such military action.

They never got that endorsement. The UN clearly did not feel that it was a good idea to launch that war. You can't change that or fudge it by referring to wording in much earlier UN resolutions and twisting them around to try to prove that the UN endorsed an invasion which they did not endorse!

The fact that the USA failed to get the UN to endorse the invasion of Iraq in 2003 was embarrassing for the Bush administration...no doubt quite frustrating for them...but it did not stop them from doing what they had already decided to do anyway. Of course not. They don't give a tinker's damn about the UN or about international law or anything else like that, and to imagine that they ever did would be naivete of the highest degree.