It's really not all that complicated, he does it one because it generates content and views/clicks, and two because he's a Chiefs fan and the Bills and Chiefs have been going at it each other hard in the AFC for the last 4 years and his persona on that show is always as a Chiefs homer.
Bengals, Ravens they've been up there but no team other than the Bills have as consistently been going at it with the Chiefs outside their division I'd bet. Hell last 3 years we've tagged them in the regular season. No way a Chiefs homer likes us.