It’s hard to fully understand what his motivation for the tweets are without context. Looks like at least one of them may be a response to Mark Cuban.
I’ve been to the first three games (for the first time since he was signed) and it does sound more like “boo” than “beease” to me. But if this has been the same sound fans have been making for several years, he should know that as well as anyone.
But maybe this is just him responding and having Twitter arguments with other people, rather than him calling out Bills fans specifically.