Somerby is right that liberals often make excuses for famous liberals’ sexism. Ed Schultz keeps on getting brought up, but he wasn’t suspended because of massive protest from liberals. And, if I remember correctly, liberal opinion was divided between “Good for MSNBC and thanks for the apology” and “But Rush, etc., never get suspended!/Laura Ingraham is awful!”
No, saying someone is a slut once isn’t the same as a three-day tirade. But things don’t have to be exactly the same for them to be on the same spectrum of behavior where the less offensive violations justify the more offensive.