Most of the ones kicking the crap out of him were security, it's that KGB training

If you look close you see one of the guys in jacket and tie quit stomping him long enough to cuff him .
Toward the end the guys in shirt sleeves coming out the crowd to get in on the azz whooping got a laugh out of me .
Can you imagine the sh!t storm if Secret Service had beat the snot out of John Hinkley ?
Now a days if some one whacked His Excellency Barack I the crowd of kool aid drinkers would tear him / her to shreds.
I'm not even sure it was a real gun, I saw a bit on the AM news talking about a "gas gun", I'm assuming tear gas.