I'm not aware of any direct threats but it wouldn't surprise me if such things were said.
By "no tolerance" do you mean gunfire into the crowd?
From what I could see the crowd was quite peaceful until they were told to disperse, then shot up with tear gas. One could easily argue the cops picked a fight here.
That kind of thinking is what allows for animalistic chaos and terrorism, no rule of law whatever.
Before obama finished speaking, the crowd was already destroying police cars and throwing rocks and bricks at police and others. Thats when the pepper spray started.