Labelling (all?) American (Allied?) personnel as "antifa" or even "anti-fascist" is an interesting move. The article doesn't seem to demonstrate what you suggest it does nor does it seem particularly relevant in general.
What are you trying to say?
That, if we accept that logic, we must either say the Allies who fought in WWII didn't value democracy, or we must accept a definition of anti-fascist that is so broad, it easily includes people even many on the right would call Nazis.