I'm not aware of any feud, I think Beck's making this up......
That also I occurred to me.
What I had heard once was that Levin got mad because Beck had used some material from one of his books without crediting him. Don’t ask me to document that—it’s just something I heard.
But I’m sure that others may have added fuel to the fire with their innuendos, etc.
I have long suspected that Levin is hard to get along with in person, unlike Rush and Hannity. A local host let a lefthanded compliment slip.