Collins evidently thought he could get away with being insubordinate, which turned out not to be true.
Collins apparently has the liberal-disease of thinking that anything he does, no matter how outrageous, is compassionate and moral, and anyone who disagrees with him is evil. He also sounds like a vindictive prick.
Now as to the latter part of this 'conservative' Telegraph article....they just couldn't pass up the opportunity to sneer at the American troops, could they? The Telegraph is a bunch of pricks, too.
If the Telegraph is anything to go by, Collins probably did hear a lot of nasty anti-Americanism from the Brits. That, however, is NO justification for ANY of his behavior.
I hope Collins ends up in the pokey for insubordination and filing false charges.