It should be noted I could be seen more on the left on many issues yet I do not idolize this person. It's a mistake to use binary thinking to group people all together.
I don't know how much credence you can put in it, but I was told by an African student years ago that it was like an urban myth put out to strike fear of Amin in the masses. He still did horrible things.
CHE HIMSELF ADMITTED TO ORDERING THOUSANDS OF EXECUTIONS AT LA CABAÑA DURING THE FIRST YEAR OF THE REVOLUTION. THOSE WHO MANAGED TO SURVIVE SAY HE FREQUENTLY DELIVERED THE KILLING BLOW HIMSELF IN THE SIDE OF THE VICTIM’S HEAD WITH HIS PISTOL.