I just watched Ann Coulter on Jay Leno, and he spent most of the time hassling her for using harsh words about four female political activists. He said that he likes to be nice when he makes his points, and he questioned her use of the term "broads".
About once a week, Leno makes fun of Michael Jackson as being a child molester, even though Jackson was acquitted of all charges. Sitting next to Coulter was George Carlin, who is famous for using the Seven Dirty Words in comedy routines. Leno didn't question him about using coarse language.
I can understand some people thinking that Coulter is a bit strident, but Leno was being ridiculous. What Coulter wrote was mild compared to what Leno and Carlin say all the time.