"If you are bashing, trashing, undermining, or depressing turnout for our candidates during election season, we'll assume you are rooting for the other side."

In short, he was engaged in efforts to depress turnout.

In general DUers who threaten not to vote are being given the benefit of the doubt. It is assumed that they will stop threatening this when we have a nominee. But Manny made it clear that his position would remain unchanged -- and he was trying to enlist others to his cause.

They were right to ban him from this Democratic site.