You can add producer Bob Ezrin to the list of rock vets who don't think much of Kanye West's contributions — and count Ezrin among the number of people who've prompted public outbursts from the hip-hop mogul.

Ezrin incurred West's wrath with comments he made in a guest editorial he penned for the newsletter distributed by music industry pundit Bob Lefsetz. Calling West's production skills "sophomoric at best" (via Complex), Ezrin also took issue with West's propensity for confrontational behavior.

"Kanye’s greatest achievements have been in the form of excessive behavior, egomaniacal tantrums and tasteless grandstanding," argued Ezrin. "What he is a true artist at is living his life out loud – and shoving it down the throats of the rest of us whether we give a s--- or not. He’s like that flasher who interrupts a critical game by running naked across the field. Is that art???"

Naturally, West didn't appreciate Ezrin's observations, and took to Twitter to let him — and everyone else — know exactly how he felt. In a string of tweets, West wondered whether anyone had heard of Ezrin, accused him of being an old man who has "no connection with anything" and called him an embarrassment to his children.

While Ezrin's discography is studded with classic rock credits — including hit records for Alice Cooper, Pink Floyd, Lou Reed and Rod Stewart — it should be noted that he hasn't been professionally averse to hip-hop; in fact, he was behind the boards for a special charity version of rapper K'naan's 2009 single "Wavin' Flag," which helped raise money for victims of the 2010 Haiti earthquake and won a Juno Award for Single of the Year.

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