A lot of these guys are used to playing with more time and...

A lot of these guys are used to playing with more time and space. They played the game a lot slower in their native country. They are not accustomed to the high pressure, the voracity of the Americans. When players accustomed to more time on the ball don't get it, they sometimes feel the referee isn't protecting them the way he should. He gets frustrated because he isn't performing the way he is accustomed to, and he lashes out, often at the referee.