Wow. You are very cynical. So your theory is that Eminem is doing this to maintain a "bad" public persona? He's dissing them to regain some connection to the "underground"?
I sincerely don't believe Eminem is really sweating the Dilated Peoples demographic, he sold 8 million records in a couple months.
I don't even like him a lot, but I realize bias when I see it. You REALLY don't like him. Cool. But realize (have you HEARD the song?) that he simply mentioned them in ONE line of a song. You're drawing an awful lot of theory off a stanza.