Saloth Sar did achiev a high degree of agreement and no opposing views.
Was working in NYC with a buddy of mine, some years ago. Near the worksite was a bookstore filled with Communist Propaganda. Pictures of Che in the window, posters with George Bush as the devil, and so on. I paid it no attention, it was all garbage as far as I was concerned, not worth wasting time with.
Buddy saw it, though, and absolutely went nuclear. Since he always was a quiet and undemonstrative man, I was stunned. Even more so, when a 3rd co-worker and I needed to each grab an arm and drag him out before he did too much damage to the store and/or the cops showed up and arrested him.
We got him into a diner, poured some coffee into him, and got him calmed down enough so that we could understand him - his English got worse when he got excited, and this was as wracked as I'd ever seen him.
I'd always thought that he was from Thailand - he wasn't, he was from Cambodia.
Roughly, and again keeping in mind the language issue, he told us the story. His father was a doc, and was killed along with his older brother early on in the purges. He and his mother were smuggled out in a shipping container through Singapore, finally arriving in London. (Cambodia to Singapore to London in a shipping container? gives me claustrophobia just thinking about it...) He had no idea where the rest of his family was, if they were just scattered, or if they were still alive.
This was several years ago, hopefully, he's made some headway in finding his family. I don't work with him anymore, it's been a few years since I've run into him.
It was an eye-opener for me, to be sure. It's cliché, especially here on FR to say, "Yeah, Communism is bad. Killed 100 million people last century. Etc." But this event, personified the evil that it represents, at least for me. Made me look at all of the useful idiots - College Protestors wearing Che T-Shirts, fools at the Communist bookstore, and so on, in a much darker way for what they represent.