I've also read Adam Smith on the subject, and he makes a lot more sense. And a smattering of a few other economists.
You should take the time to educate yourself. You might learn something. Probably not, but maybe.
I'd like to see you walk into any economics class in this world and make this argument about Karl Marx being in favor of unrestricted free-market capitalism (free trade). Can you show me what examples you have that you would use to make this argument?