[CM30]

Sadly, it's probably the first one. Awful people were bullying others for all sorts of reasons before that episode, and have done so for all sorts of other reasons afterwards too. If someone wants to be a bully, they'll find something to bully others about regardless of how their victim looks or acts.

On a related note, it's interesting that folks in the US tie the anti redhead thing to South Park, given it's been an unfortunate prejudice here in the UK (and presumably other commonwealth countries) for decades. I guess that episode ended up importing a prejudice from one country to another?