Ernesto "Che" Guevara: reasons to why some Cubans consider him a murderer?

Che was an Argentinian who became close friends with Castro before the launching of the Cuban Revolution of the late 1950s. Che became a leading figure of the Castro regime in it first years, but went off to promote revolutionary activism in Africa and South America by the early 1960s. He was captured and killed by the Bolivian army (I forget the year). Che became a symbol of 1960s revolutionary leftism after his death, was hated for the same reason by reactionaries; especially by the former Cuban ruling oligarchy that was overthrown and run out of the country in 1959.