Yes, and your government has also used nuclear bombs, napalm and phosporous. It doesn't matter what your government tells you is okay as it is clear that your government doesn't care about what is okay. Your government tortures, renditions and lies to invade other countries and that is the sector that you have signed up for. Now how any of that can provide a legal framework for anything is insane. I am am sure Hitler had a legal team telling him he was well within his rights etc.

Law is irrelevant as compared to what is moral. Most people would argue that the war in Iraq was wrong and on that basis alone, it doesn't matter about legality. Most would agree on phosphorous too. A country like America talking about chemicals and getting involved in another countries civil war is a joke and not a funny one.

America is the bogeyman and it doesn't take me to make it that way. I am a marginal person, but practically every English and American person I have read is condemning England and America and at the end of the day you are too. We just disagree on phosphorous which any chemist would tell you has all the hallmarks of a chemical weapon. Legalese doesn't hide basic science.