It happened a long while ago, when PA, specifically Jerry, the writer, was of the mindset that only he was being true to the art of cartooning and UF was anathema.

Jerry has since changed his tune, and in fact he apologized for his behaviour. I never took any of it personally, because I honest to god can't be bothered to devote any energy to dealing with negativity and pride from others. It defeats the purpose of having fun when you create.

There's a lot more to this story, but at least you have the gist of it now.