As a completely practical matter, a country is entitled to do what it wants to protect an industry. I'd agree that it is usually a bad idea, but every country does it to some degree. If France decides it has a right (god given, or lawfully given) to a wine industry then it can ban all wine imports. I'm not sure why you'd call out America for this, it has been far more open to trade than most countries, and benefitted from it. UNfortunately it has left some people behind and caused a backlash.