It's important that more people see officers and get the impression that they are there to enforce peace, not dole out violence -- while still ensuring they have the tools to maintain safety and order. Large, threatening military-style vehicles don't send a good message to people who are already scared for their safety.
I don't remember who said it, in relation to sports - "Look good, feel good, play good." I think how you look can absolutely affect how you behave.
People trained by the military to police occupied communities should not be allowed to act as civilian police in peacetime conditions.
Ex-military cops were almost 3x more likely to be involved in a shooting.