Why is that a bad idea?

I hadn't noticed this from an email to Kevin Parrott from faux-ranger Micah Wright, "the real reason we invaded Iraq: because we want a good base to invade Syria, Iran, Saudi Arabia and Egypt from." And all four of these regimes deserve to be preserved why? Not that we're really about to do such a thing, which would overextend our military dangerously, but the world would be a better place if they all were replaced by democracies.