Nazism promotes one or more groups being superior over others, while communism promotes the veneer of equality/equity among multiple groups. The lure was and still is appealing to the desperate (which is how the ball got rolling in Tsarist Russia).
Of course, the world (should) know better that the veneer is complete and utter
bullshit, and the atrocities committed by communists speak for themselves... but to the dumb and desperate?
"It'S GoT tO bE bEtTeR tHaN wHaT wE hAvE nOw!" says the dumb, trust fund college kid, while she sips on her $10.00 Starbucks and tweets on her $2,000 iPhone, being completely unaware/clueless that if she were in a truly communist country, she'd either be in a factory, a field, or spend her days in some mansion somewhere as some government member's personal fuck toy (if she's pretty enough). "iT wAsN't ReAL cOmmUnIsM, BruH!"