An honest question.

Why do comunists think that If the USA went communist it would somehow resolve all problems like:Homophobia,racism,class inequality etc. And that somehow they will also be richer and more happier when that isnt the case.Like in my country(Romania)my parents hate the idea of communim having to stay in line for half a bread, having only at certain hours hot water, being cold at nights not having heat and sleeping with boots jakckets and a scarf and the fact that oranges were considered a luxury and were only given on Christmas. Neighbours, colleagues and managers that worked for securitate (Romanian KGB) created a sense of untrust for some people. And finally the idea that rich people dont exist in communist societies. Securiști and the politicians had it better they had the luxuries:fancy clothes,multiple houses and fine food. So the question remains why do they think that communism is the solution? (Sorry for bad grammar)