The clerk did notice.
Seems pretty obvious to me the victim bought the bum a beer, and the clerk got pissy with him for encouraging a loiterer.
Victim got incensed over his “tolerance” and “SJW” creds being disrespected, and away we go....
Now this is making more sense.
Victim was a member of “Patriot Guard Riders.” The bum he bought a beer for was probably a vet. Folsom might have been outraged by having another vet disrespected by a convenience store clerk.
He even makes a appeal of some sort to the shooter at one time while he’s bitching out the clerk.
The shooter showed exceptional restraint given the size and comportment of Folsom.