>>6340954As much as I hate most of the modern so-called "Communists" that are just liberals in disguise, Communism (as explained by Marx and even Pekhanov before him) is against the formation of national barriers as they divide working classes. This is in favor of the bourgeois state, as it prevents a unified uprising between the working classes of multiple countries due to nationalism/regionalism, while bourgeois individuals regularly aid each other across borders.
tl;dr borders are arbitrary lines drawn on a map and making judgements about people based on them or supporting them is playing directly into the hands of the same people you're trying to overthrow.