How is it any different? Because they kill 20 million communists in Indonesia and Latam instead of inside their own borders?

Edit: The DSA aren't in power nationally and have yet to truly confront the contradictions of imperialism and the welfare state. In the best case scenario where they take power they will be forced to confront them.

The party will eventually have to choose between taking a revolutionary stance or choose reform and thereby wither in consent to capitalist imperialism. That will be decided by whether the socialists can win out over the social democrats.