When Team America came out libs went nuts; "these guys have sold out BIG time" (they felt it was too far to the right).
One of the SP creators has been quoted as saying "We hate
conservatives but we really f---in' hate liberals."
I remember the quote. I think that was Matt Stone.
I think what they have found over time is that most conservatives will at least laugh at themselves, but libs have no sense of humor whatsoever, and therefore make better targets.