Fair enough.
While Iran's lousy human rights record speaks for itself, it doesn't approach Pol Pot's level of atrocity.
The first person I plugged into this analogy was Stalin, but I figured it would be more confusing than if I used someone I knew had nothing to do with WWII. I pulled Pol Pot out of a hat. You are welcome to plug the tyrant of your choice into that space if it works better for you.