Being patriotic for a bourgeois state like the PatSocs absolutely is incompatible with communism. You can't be a communist and a patriotic citizen of the USA, that's just impossible. Things look differently when you live in a nation like Vietnam that at least tries building socialism and that has struggled for its indepence from reactionary, genocidal imperialists for literal decades. If people are proud of shitting on the entire world, i can only shake my head in disgust. But if they're proud of perseverance in the face of constant, unwarranted hostility, i find that fairly relatable.