If a man like Santorum was President, Google would probably be required by law to fix it. The problem with your excellent comment is that nobody gamed Google's search ranking. Google can't censor the result as it is legitimate.

The real problem here is Santorum's insane ideas and forcing his delusional beliefs on the public. Thus the Internet public has chosen to redefine his name as cultural slang. For Google to censor this would be simply wrong.