One of the arguments that I have heard anti-war protesters making toward college Republicans and others is "If you support the war, why don't you go sign up for duty." They insinuate that you cannot support something unless you are actually doing said activity.
Let's apply that same sentiment to law enforcement. You cannot support crime fighting unless you become a cop and put your life on the line to protect and serve.
You scoff and say that I am being silly? I am being no more silly than people who believe you have to be a soldier to support the war.