He used victim card wrong; if he had quoted your post about how the OP is out to get your fanbase because he hates the Leafs then he would have a better point. However, it doesn't look like he was off the mark by saying your post was arrogant. The bolded sounds pretty arrogant to me, no?
His behaviour might be dubious in your opinion, but then you to go on to assume that all people who act "dubiously" would rather live like children, with a life void of consequence? Of course you provide a nice solution by saying that these people could stop the dubious patterns if they simply found some personal growth and maturity? But naturally, it is doubtful that they will ever grow or be mentally mature.
Right - that's quite the psychological profile that you drew from a few posts in an on-line forum. He could be quite a nice person, maybe he comes on here for kicks or jokes. You've never rubbed some people the wrong way? That passive-aggressive post doesn't come out and say, "I'm better than you", but it comes about as close as it can and it sure is haughty.