I don't know about you, but when I saw this episode, I was thinking:
"Am I watching a South Park episode right now? What is that?" There is almost zero fun, no dark humor neither. Just a lame scenario about people dressing up as a witch, and one of them become a real one, and the fact is, there is absolutely no goal, and they didn't know how to finish it, so, hey, let's get the president, and he kills the witch. Where is the fun avoiding to say "Witch hunt" and "joking" about it all the episode long?
Come on; it looks like a thing for 12 years old viewers. I mean it's not what you want to see when you are watching a South Park episode.
It is just "meh." Season 7 miss me so much.