Yes, only if loss of life is imminent.
Yes, to prevent both property damage and loss of life.
No. The Government should kill the rioters.
"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung
Not under ANY circumstances.
Up to and including space aliens threatening the total destruction of the solar system unless they do.
Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering. ~ R. Buckminster Fuller