Lost ad revenue? lol. Yeah that is it. Why offend 1% when you can go after 90%?
This whole thing is about the PC climate in America. I know I'm coming off like I'm the president of Comedy Central, but I don't think you can blame them for this. You have to blame the whole PC culture, which would create a whole storm of controversy around Comedy Central which they really don't want. Some people may feel like its their duty to brave this storm and not bow down to PC, but in the end they're a company and they don't have any moral duties to anyone.