All you are doing is proving my point. China has a population over a billion, growing industrial strength, and the ability to conscript an army easily bigger then yours. Russia and a few other countries still have ready nuclear weapons. You simply aren't as safe as you think you are, and it's the fact that you DON'T take out other nations that enables you to keep your own nation. Safety in peace is just as important for Americans as it is for many other smaller nations.
Yes you are just strong enough to get yourself into trouble in the wrong hands. The globe doesn't need grandstanding military powers whether it be the US, Russia, or China. Fuck that. As much as we'd like to think you'll behave and understand this, Canada like many nations on the planet will turn on you as a group if you get out of line.