I just noticed that Boing
Boing published a response from Comedy Central to those that were complaining about the episode.

Dear Viewer:
Thank you for your letter regarding the "South Park" episode entitled "Bloody Mary." We appreciate your concerns about the potential influences of outside special interest groups on the media and enterainment industries and particularly Comedy Central. Though Comedy Central did not include the "Bloody Mary" episode in a special year-end marathon of "South Park" episodes in deference to the Holidays, "Bloody Mary" did in fact air in every one of "South Park's" normally scheduled repeat timeslots.

As satirists, we believe that it is our First Amendment right to poke fun at any and all people, groups, organizations and religions and we will continue to defend that right. Our goal is to make people laugh, and perhaps if we're lucky, even make them think in the process.

Despite misleading claims from those who would like to claim victory, we have not permantly shelved the "Bloody Mary" episode from future airings due to outside pressure nor will we exclude it from future DVD releases.

Sincerely,
Comedy Central Viewer Services
 

I'm always telling people to turn the other cheek. This is a good example of why they should. I bet the Bloody Mary eposode had more viewers than the others.

Will calls to boycott South Park ruin them? Will they disuade their satirist from controversy? No chance.

Anyway, I admire the programme. Mr Hanky the Christmas Poo (their Christmas best seller single) taught my daughter the word "vicariously" at a very young age.