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It started Tuesday night, when West asked, "Has anybody ever heard of Bob Ezrin?"
Ezrin, a 66-year-old music producer who has worked with artists such as Phish and Pink Floyd, wrote a harsh critique of West in industry analyst Bob Lefsetz's popular music newsletter.
"Unlike other creators in his genre like Jay-Z, Tupac, Biggie, or even M.C. Hammer for that matter, it's unlikely that we'll be quoting too many of Kanye's songs 20 years from now," he wrote. "He didn't open up new avenues of public discourse like NWA, or introduce the world to a new art form like Grandmaster Flash, or even meaningfully and memorably address social issues through his music like Marshall, Macklemore, and Kendrick."
The producer also said, "Kanye's greatest achievements have been in the form of excessive behavior, egomaniacal tantrums, and tasteless grandstanding."
West didn't take kindly to those criticisms and unloaded on Twitter saying, "What the f--- does he know about rap," "Do something relevant," and "I'm tired of old people that have no connection with anything trying to comment on music."
I'm tired of old people that have no connection with anything trying to comment on music!
Do something relevant… Please don't speak on me bro ever again!!!
- KANYE WEST (@kanyewest) February 24, 2016
Your kids are ashamed of their dad… Sorry for speaking about kids… but could you imagine if you were Bob Ezrin's kids…
- KANYE WEST (@kanyewest) February 24, 2016
I'm so sorry for them… I will send them free Yeezys to make up for the embarrassment that you have caused your family!
- KANYE WEST (@kanyewest) February 24, 2016
Welcome to pop culture!!!
- KANYE WEST (@kanyewest) February 24, 2016
Ezrin I truly feel sorry for your friends and family that they have had to suffer an idiot like you for so many years…
- KANYE WEST (@kanyewest) February 24, 2016
God bless the fools … all positive vibes!
- KANYE WEST (@kanyewest) February 24, 2016
I really didn't mean to use the B word tonight … all positive vibes
- KANYE WEST (@kanyewest) February 24, 2016