How do you de-escalate an occupied building on fire with violent protestors preventing emergency services from saving children?

The police are obviously totally overwhelmed, and like it or not the military has the legal authority to operate domestically and without them being there more people could've died.

I don't understand your position. There's an occupied building on fire, with children inside. Protesters are attacking fire crews. What is the ideal outcome? I didn't see a fireman with his knee on anyone's neck. Why attack them, if not to cause destruction and murder people?

Arson against residential buildings is terrorism. That's it.