I find it hard to believe anyone would be so naive, or so manichaean, in their outlook; the ghost of McCarthyism apparently still haunts America.
The communist movement was a reaction to the appalling working conditions in capitalist democracies of the 19C. It was founded on universal rights, the end of the class system, universal education, the right to peaceful assembly etc etc. Things we now take for granted in the West, but which were won after hard struggles here. Rights which, I might add, are now being fought for in so-called communist China - present day China is no more communist than Stalin's Russia. It's interesting that although Marx's predictions of world revolution were way off the mark, his analysis of the contradictions inherent in capitalism are just as applicable as ever.
Just because it was also taken up by many dictators the world over as a convenient excuse for imposing dictatorship or fascism, from Lenin to Mao, does not mean it is the polar opposite of Western democracy - quite the reverse in fact - many of the things we now view as central to our democracies started as radical ideas in movements like early communism.