The Marx quote shows that the desire of Karl Marx, a man who wanted worldwide communism, was to have free trade to hasten the onset of communism.
You cannot be missing that point accidently. You must be doing so on purpose.
No, I understood his point that by reducing nationalism, which protectionism uses as excuse, it would focus energy on the struggle between the bourgeiouse and the proletariat. I consider the 'struggle' between classes to be bunk, possibly apt in still present in the turn of the century serfdom of Russia, but not in America where people move through the 'classes' during the course of their life. Surely you've read about the Treasury Dept's own 18 year study of income mobility, right? They found people in the bottom 20% to be more likely to be in the top 20% of income earners at the end of the study period than still in the bottom 20%.
If you're arguing that Marx is right, and that by not having tariffs people are going to start turning their animosity toward 'the rich' instead of the 'Red Chinese' or enemy du jour and consequently embark on a communist revolution, well, you go ahead and defend that, I think its bunk...