Was on my way home from town. The bus arrived and a teenage girl who had been stood next to the shelter climbed aboard ahead of the older people in the shelter, skipping the queue. A man (maybe 60 but tall and big build) standing behind her beside the shelter, pulled her backwards using the handle of her backpack, forcefully enough that it pulled her whole body backwards. She didn't say anything to him, kind of awkwardly smiled.
I didn't say anything at the time as I was trying to establish whether she knew him. He then sat at the front of the bus talking to the women she'd attempted to push in front of, and the girl went to sit at the back. I had a chat with her, she was quite shy and told me she didn't know him and she was just on her way home from college.
Just before my stop I approached him and told him quietly I'd seen him grab the backpack of the young woman to pull her backwards and it wasn't ok. He said she'd tried to cut the queue and it was just a little tug.
The two women who he was talking to then starting saying it was disrespectful (not sure if they meant the line cutting or me confronting him) and "oh are you woke". I said regardless of what you think of someone's behaviour it's unacceptable to touch them, and if he had grabbed the backpack of an older person, would that be respectful?
YABU - he was right to grab her
YANBU - he shouldn't have grabbed her