We need to be more tolerant of these little cultural differences. After all, it is the religion of peace.
But, but....doesn’t everyone have a right to their own opinion? To be not offended? Surely it must be the case that someone in the bar offended the Muslims, thereby ‘causing’ them to react as they did. The answer to this unfortunate incident is tolerance, much more tolerance! We must emulate the 3 monkeys: see no evil, hear no evil, speak no evil. (sarc)