Because they want to step it up a little bit in brutality of Americans.
That guy in the foreground on the right? Very telling facial expression. That is not angry, that is not happy, that is not cocky. That is the deadpan expression you put on when you know you’re in a bad situation and you don’t want to give anything away. (other than you know you’re in a bad situation)
They look all badass blocking the road.
I wonder what their reaction would be if about 100 4WD vehicles went off-road, flanked them, and parked on the road behind them?