I'm guessing you mean this video. Search on twitter and it pops up on a lot of far right Islamophobic websites. Thing is, not one identifies who the person is or translates what the crowd is chanting. Without those facts you're just being a bigot imo
whirling dervishes eh? I saw these people in Turkey. It's amazing how they can swirl for ages. No problem with this form of Islam. Think people need to educate themselves before linking these lot with extremism.