I have to disagree.
First of all, things like this happen with just about every other apocalypse prediction. There have been numerous cases of people killing themselves and/or family members out of a belief that the end of the world is upon them.
Secondly, even aside from physical violence, there is the much more widespread issue of things like the following occurring:
Relatives of church members reported family members among Weinland's followers were asking for money to cover "urgent issues" a week before Pentecost, as many had spent their savings in preparation for Christ's return and by donating to the church's warning efforts.
That pattern has repeated itself in many of the apocalypse predictions, and was especially visible with the Harold Camping prediction. By giving all their savings to help pay for warnings about the coming apocalypse, they and their dependents are left pretty much destitute, with their lives ruined. That includes retirement funds, their children's college funds, and pretty much every last penny gone.
If anyone makes a serious apocalypse claim to followers over whom they hold a position of power, they had damn well better be willing to accept at least some responsibility when these results come to pass.
And yet they get away with it. They get away with it to the point where some of them decide to do it all over again a few years later. Of course the followers attempting murder should be fully prosecuted for their acts; but the doomsayers are hardly more innocent.