It isn't just a question of that one comment. Even so, the amount of name-calling and froth in there qualifies it for rant status in my book. YMMV of course.

I would hate to think that too, and we try our best to apply the rules evenly across political divides. Comments need to be civil and substantive; this one was neither, and our tolerance for someone breaking the guidelines goes down as the pattern of breaking them goes up. Users who feel that we misread their intention and genuinely want to post civil, substantive comments don't typically have a hard time persuading us to unban them.