As an atheist living in Palestine/Israel and someone who's part of the Arab and Muslim society, I'm well aware of what can fall through in translation. Yes in the village I grew up in people will tell you that they think "death is the punishment for apostasy/ridda", but it's just a mantra that is repeated without thinking, even by some of the most wholesome people I know. Now I know that sounds like a contradiction but It's only due to a lack of education and a lack of an insight to a modern world view. It's a cultural habit as much as a religious one to agree with everything that is written in the Quran. The difference is only a tiny tiny percentage will actually carry it out. In fact Western interference and arming of fundamentalist groups is more if an immoral issue and should worry someone like Harris more.
There's a cultural divide, you can't look into other cultures from the same perspective you look into your own. You have to actually try and understand the inner workings of different cultures if you are that interested. I got myself to a place where I adhere to western and eastern values and live in a mixed culture on a daily basis. So if it sounds scary to you that Muslim's might say something like that, you will only be able to put it in perspective once you delved into their way of thinking and operating.
I can assure you that in Affleck's line of work, he can conjure up a more "real-life" opinion on the matter. I can see he was hurt by the bigotry disguised as a humanitarian view, and he let his emotions show, nothing wrong with that. Implying that he looks coked up is your interpretation. He might not be a political scientist but you only need the ability to think to see through the nonsense spouted by Harris. Of course with Harris following up by addressing the need to empower the secular Muslims/Arabs Harris manages to attract a lot people to his opinions, but don't let that distract from the fact that his fears are based on meaningless statistics.