Being thick-headed has nothing to do with intelligence; it has to do with you not getting a point when others have explicitly explained it to you and continuing to say/do something when you've been given evidence to the contrary. It means you're stubborn, not stupid.
If you really are bothered by the negative commentary as much as you say you are and legitimately can't understand why your comments come off as judgmental, then maybe you should just stay away from live-feeding threads. I'm not trying to tell you you can't comment on them or anything like that, just that it sounds like you'd be happier if you didn't since you can't seem to find a happy medium of expressing yourself in a way that this community finds acceptable on that issue.