Actually, Bernie is a Capitalist. He just believes the State should control the Capital.
What he is not, is a believer in Free Enterprise.
capitalism noun
cap·i·tal·ism | \ ˈka-pə-tə-ˌliz-əm , ˈkap-tə- \ Definition of capitalism
: an economic system characterized by private or corporate ownership of capital goods, by investments that are determined by private decision, and by prices, production, and the distribution of goods that are determined mainly by competition in a free market