If you're really Glen's friend give him the gift of truth and don't let any bullshit stand in the way.  Put your friendship on the line and give up that bullshit new age excuse that it's not your place to judge him, whatever that means.  You say you don't want to get into a big argument with him.  Fine, but you're happy to get into a big argument with us about it, aren't you?  Why?  What's the difference?