There was a large group of people who seemed to belong to some Jewish group. They were obnoxious in their behavior toward the flight crew and other passengers. At one point, they went from a passenger to a passenger asking each one if they were Jews. The flight crew did nothing to stop them. These people behaved like the airplane was theirs and we were there just as a nuisance. They did not listen to the flight crew orders. I am thinking that, if that outrageous behavior came from any other group of passengers, the pilot would have called an airplane marshall and turned the flight back to the starting point. Other people get arrested on airplanes for far less than this group was. I do not understand why this was tolerated and why all other passengers were subjected to their unacceptable behavior. This group of travelers was not a subject to any consequences for their behavior.