Yes. I'm confident that a charismatic person could walk into any bar anywhere in the world, and get some of the people there to sing along with an offensive song. I'm not quite sure how someone who's familiar with bars or alcohol in general could doubt this.

I'm equally confident that most of the people who sang along did not actually want to throw Jews down a well.

Cohen is a great comedian, but I suspect he also has the skills of a con-artist, or a hypnotiser: he manages to get people to "sing along" with him well beyond what is normal and reasonable, and then ridicules them. It's funny, sometimes very interesting, sometimes leaves you a bit suspicious.

That, and he's also arguing that they're all somehow the victims of a hate crime.