Vitriol in the Arts

Always glad to see August Kleinzahler, one of the best poets writing today, get some press. Reporters for mainstream papers who write about AK seem to like to ask Billy Collins for a quote about him. In the LA Times recently, BC remarked, on AK’s attacks on the poetry establishment: “All the vitriol…I don’t get it.”
Which makes me ask a question of my own:
Billy—No vitriol? I don’t get it.