A Station Eight Fan Web Site
He meant what he said- that they were "ungrateful snobs and ignorant peasants" and that he identified more with the gargoyles than with them. It's not any deeper than that.
Yes. (Not counting flashbacks, anyway.)
Yes. He was a casualty of war.
It gave him a psychological edge against his enemies.
[Later, he adds...] He saw the Hunter's Mask as a useful and necessary tool.
GargWiki.net has answers for all your Gargoyles questions.
Includes episode commentaries by co-creator Greg Weisman, interviews with the cast, and a documentary on the fan convention.