If even 1/4 of the actions purportedly taken by this group on the plane are true,they should have been hauled off of there at the earliest opportunity. These are not the times for political correctness and typical sleepy American behavior. The fact that we are letting ANY Syrians into this country is nothing short of ridiculous.
There I was in the middle seat between two large men wearing leather jackets with chains and other unrecognizable things attacked.
I barely understood their accents. They got up and wandered up and down the aisle chatting up other members of the group. They also gathered in small groups at the back of the plane to chat. Sometimes when one from up head of my row went by he simply wagged a finger at his mates in my row.
As a fairly frequent flyer I find that people get up and stand in the back regularly because the seats are so darned uncomfortable or you just need to stretch. I have stood and chatted back there with the flight attendants. Business men get up and take things out of their luggage in the overhead bins and just about everyone going to the rest rooms carries their purse or whatever with them.
These are all typical things on flights, especially flights of four or more hours.