True. However, I think an over armed response can *sometimes* contribute to the violence that occurs. Perceptions matter, particularly in cases where emotions are already at a boiling point.
As I pointed out earlier in the thread, Atlanta protesters were, IIRC, guess-timated around 10,000. APD had SWAT for back up, not as a first line defense. No injuries, no property damage. At one point, protesters climbed on a semi, and it looked like things would get ugly. The Mayor went, in person, out to Williams St to speak directly to the crowd, and the situation settled down.
While I can't say for certain how much the specific event contributed to keeping the peace, it seems to me to at least play *some* part. Again, I believe perceptions matter a great deal in these scenarios.