Holy fuck bro. Are you insane or retarded?
“People behind” her wasn’t the problem.
Her not being aware of her surroundings isn’t the problem.
A man stabbing her in the neck unprovoked is the problem.
When people act violently for no reason we generally don’t scratch and claw for a way to find out what the victim could’ve done better. That’s evil bud. You’re an evil bastard.
You should feel ashamed.