kali I think it's because of the difference in the way they were spoken to by the same people.
She was sworn at, he wasn't. I couldn't hear anybody swearing at him on the video, yet it was all "fucking this" and "fucking that" when people were shouting at her.
She was called a slag, he was called mate.
She was laughed at (pathetic, how old are you), he was sympathised with (he's scared, look at him).
She was threatened (lets tip her fucking car over), he was helped (offers to drive his car for him, holding his wheel to help him reverse, given advise about needing to reverse because the police might take his licence if they arrived and he wasn't able to reverse safely).
People were leaning into her car waving arms and pointing fingers and getting in her face, he was enclosed in his car but the body language of the people standing by it was different.
That's why people are talking about people having a go at her, because it was different and she bore the brunt of the aggression.
They were both being asked to back down, both being told to move. But in very different ways and the way she was treated was much more aggressive and threatening.