i'd be more worried at getting pissed off at someone on the internet for not liking the elastic hem of a leather jacket. i don't like shoes with thick tongues but i couldn't tell you why...i don't think that makes my opinion any less valid, i just think thick tongues look terrible.
his opinion wasn't even necessarily directed at you, but rather the piece of clothing. i don't really think you need to be so defensive in this situation. i'm sure he has every right to have an opinion on a piece of clothing when you're not even in the picture itself...i don't understand.