All widely-held positions have SOME strong power behind them. However, Communism in real life is atrocious, and AFAICT, unsupportable. WTF?
My suggestion: Communism's attraction is an evolved emotional response to hating power-differentials. Communism works beautifully in a scarcity-free economy...like, say, the forager economy that our brains evolved in, and the projected post-singularity economy of 2050 that we are currently teasing around the edges of. In particular, the life of a rich youth (all American youth?) looks suspiciously similar to the post-scarcity world. In the situation that individual effort is a deciding factor in wealth-creation, on the other hand...Communism fails badly.
Just so story that makes a whole section of people make better sense.