Can somebody describe to me a positive, negative, and a purely statiscal viewpoint on the life of Che Guevara?

Che was a cold-blooded murderer who executed thousands without trial, who claimed that judicial evidence was an "unnecessary bourgeois detail," who stressed that "revolutionaries must become cold-killing machines motivated by pure hate," who stayed up till dawn for months at a time signing death warrants for innocent and honorable men, whose office in La Cabana had a window where he could watch the executions – and today his T-shirts adorn people who oppose capital punishment!