Yes, it's a threat.
There's no other way to interpret it.
Oh, and the Religion Moderator has already corrected him on that other bit about driving out fringers.
Good, that's important, because otherwise FReepers will assume the Religion Moderator and Sinkspur are in collusion, that they planned the driving out from the Religion Forum of those with whom they disagreed, and that Sinkspur is beyond touch.
It is important to correct that erroneous notion.