Does the behaviour of one group somehow excuse the unacceptable behaviour of another? "Two wrongs don't make a right"?

(Not debating the "even-ness of wrongs", as that is a six-year-old's excuse for punching their sibling - "They started it!!")

Except there was no unacceptable behavior from the part of the kids (unless you consider "standing and smiling while being abused by racists and nutcases" unacceptable behavior). That was a complete fabrication to make the story fit the narrative. There weren't two wrongs - there was just one wrong, and it was from the other side than the press claimed it to be.