Nice, just throwing insults out there for the sake of insults. No soup for you!
To be fair, it's not an insult as much as an assessment. And considering your post he was replying to, his assessment isn't very far off.
Using a "slippery slope" argument in a thread centered around the NFL banning fans for racist heckling shows a complete lack of reason.
This isn't a first amendment issue and it's pretty common knowledge what kind of language will not be tolerated.
It's fairly easy to avoid saying racist things if you're not a racist,so you nor anyone else should have anything to fear with regard to a "slippery slope".
Often times when arguing a larger ideological point, people can lose sight of common sense. And I think that's what you've done here.