Communism isn't just a social or economic ideology; it's also a philosophical and political ideology. There are various schools of thought, but they all advocate for the common ownership of all means of production (i.e. no private ownership). In this sense, it's a gross exaggeration to say protesters who want protections (e.g. so their disabled relative is guaranteed access to insurance) are communist. The protestors never advocated against private ownership and are very far from the ideology of Marx.

The best example I can think of is it's analogous to labeling anyone who advocates for reduced immigration "fascist." Yes, nationalism is the principle foundation of fascism, but just because someone thinks immigration should be limited, obviously doesn't mean they're fascist.

I am not criticizing your position regarding the ACA. Think as you like. I am, however, very critical of anyone who labels other Americans "communist" simply because they hold views left of their own.