Yeah, I thought about posting that Amazing Atheist video, but I didn't want to be the first one to do so. Anyway, I agree with his point about disabling comments. I agree one should be able to face criticism against one's ideas. Sure, they'll be some troll comments, it's part of the internet, but there are legitimate criticisms, as well as supporters. Disabling comments shows to me that she doesn't want a discourse of any kind.
So you don't even bother to hear his reasoning before turning it off? Why? You should at least listen to his points before outright dismissing them.
And of course the screen cap showed only the disgusting comments, she deliberately selected them to get her point across. Besides, I guarantee you most of those were troll comments (obviously doesn't make it okay). She obviously wouldn't show legitimate criticism or supporters, only the worst of the worst.
Also, take a look at the comments sections of some of her other videos. I don't see many troll comments. I see support and discussion.