Quote - You did not like the look or demeanor of the security guard, therefore he was a thug.

This is called prejudice.

Sorry, but you are wrong.

I did take notice of both of them. I sized her up in comparison to him (she was both shorter and smaller than he was). However, I only mentioned what he was wearing because even though she was a "thief", she was still the victim because he was literally beating her up and throwing her to the ground head first.  That is just wrong, no matter who she is.  I would feel the same if it had been a guy getting thrown to the ground by another guy.  It's just not right. It's dangerous and it can kill a person.

Again, when all this started, I did not   know she was a thief or that he was a security guard at the time. So far as I knew at the time he was her boy friend beating her up.  So I made sure I had him committed to memory to report  to the police.  And yes, he was dressed like a "thug".  And again, she did not have a weapon and was no physical threat to him, he had no right to throw her down head first into the concrete. It was excessive force.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi