Cutting someone off

How do you or would you go about cutting someone out of your social interactions? I'm really struggling after a conversation I had with a coworker about a week ago. Him and I were friends and I'm friends with a lot of co workers. We were discussing all of the college campus rape cases and he voiced some very problematic opinions that as a victim of rape when I was in college, that had similar circumstances to what had been in the news I was really bothered by it. I can handle working with said person but I really don't want to socialize with someone that victim blames like that. I don't know how to approach it without causing problems.