Sigh ... I'm probably going to regret engaging with this. However, out of curiosity, I Googled fatpizzaman's Youtube Channel. There is a similar comment there ... except that the version posted on Youtube doesn't match what fatpizzaman quoted above, and doesn't mention my username at all. And the user who left that comment is (surprise, surprise) no longer registered on Youtube, so I don't know how fatpizzaman determined that he or she is a "member of this community."
Here's a screenshot, in case the version on Youtube should mysteriously change or disappear in the near future.
The most tolerant explanation here is that fatpizzaman has been fooled by some troll trying to cause trouble, probably UMDwamDawg himself. There are, of course, less charitable interpretations, too.