"Mowing down" doesn't mean anything except mass murder, generally using fully automatic firearms. We both know this.

This is Destiny saying that if it takes someone committing mass murder to stop property damage, it is justified. There's no two ways about it.

Whether it is tamer or not than "America deserved 9/11" is a matter of opinion, I won't pronounce myself on it but I totally understand that opinion. It is categorically true that while "America deserved 9/11" is a statement of ethics, saying that you personally bless mass murder to prevent property destruction is incitement of violence.