Just because I think his books are funny does not mean I approve of what he did, there are some of his stories I don't like because he went too far out of line. Tucker's books fall under the category of stuff you know you should not laugh at but do anyways. Again just because I think his writing is hilarious doesn't mean I think he is a great human being or anything like that, and it doesn't mean I would ever do some of the stuff he did either.
And also if you have read all his books you would also know it has been interesting to see how he has changed over the years, go read the big pieces Forbes did on him a few months ago to see what I am talking about.
I also think Family Guy is funny, but I think Seth MacFarlane (creator of Family Guy) is butthead(had to use a CB appropriate word). So would you make the same complaint about my sig pic if I had a pic of Peter Griffin in it?