In 1978, 913 followers of Jim Jones and the Peoples Temple committed a mass suicide in northern Guyana at a site called, Jonestown. The charismatic leader of Jonestown, was Jim Jones, a preacher who set up the Peoples Temple in San Francisco and ultimately moved his followers to a more clandestine site in Guyana.
Suicide cannot be revolutionary for Marx because suicide, particularly en masse, by an oppressed people effectively eliminates the very people who would be revolting.