Because marxism has worked so well before.
Because it is what the Democrat Party has wanted for over seventy years.
I’ve heard some radical types say, that the failures of socialism were due to it not being implemented properly. In their view the people in charge of failed socialist or communist countries simply didn’t do things right. The flaw was in the execution not in the doctrines of socialism.
I think that’s nonsense but the true believers such as a Bernie Sanders have a religious faith in that concept.
It is insanity to blindly follow an ideology that has never worked and has resulted in the deaths of hundreds of millions. The lie and indoctrination promotes that Marxism/Socialism/Communism etc. can work in America if it ultimately ran like China ditching the Constitution having a quasi Capitalist/Communist/Socialist utopia. The funny thing is the Bernie Sanders sheep always uses the Venezuelan and Cuban example.