Well you said they dont world systems theory so i assumed you had evidence of that. Saying "down with yankee imperialism" is hardly contradictory. They might not literally read Wallerstein but if youre going to deny his development of theory and its applicability to modern conditions (that Marx and Lenin never observed) based on what you think the DPRK and Cuba think about it i would assume youd have something more solid.
Che said that the United States is the belly of the beast. That certainly seems in line.