There are inconsistencies in the US reasoning behind its attack on the Syrian air force. For instance the US currently uses chemicals ie. poison gas, in killing its own citizens. Since 1924 lethal cyanide gas has been used as a method of execution in the US; I understand that its use is still lawful in Arizona, California, Missouri and Wyoming.
I remember that chemical weapons, such as Agent Orange, Napalm and other chemical mixes ie. fuel-oxygen mixes, bombs were used extensively by the US against the Viet Cong, as well as the Vietnamese civilian population (collateral damage), during the Vietnam war; millions of Vietnamese are suffering from its soil contamination and toxic effects.
I had personal experience of the long term effect of these weapons. When I was studying in Moscow in the 1980s, for some reason I received my Soviet stipend in the company of 90 demobbed Viet Cong mature students, who were also studying in Moscow ; we got to know one another.
Sadly, one of them fatally succumbed to the injuries he received defending his country.
Micheal O’Cathail, Fermanagh