Is it an insult to Eminem to call Sim Jesus Shady's "demon spawn"?

Today, the internet has taken notice of the track 'Drill Time' from the boyish looking Chicago emcee.

As you an see, Slim is not subtle.  (Although all illegal material in the visuals are just "props.")

Some have said this a Chief Keef diss, but we don't see any evidence of that. Slim Jesus is gunning for us all.

Does he have a future, or does this come off as a joke?