As others were suffering from her actions, that still brought up flashes of her past experiences so it was uncomfortable for her.
There were times when she wanted to stop there but she kept making herself keep going.
She empathized with them on a deeper level since she had experienced such similar things but that was not enough to make her forget everything.
She set out to do what she had to do and she could no longer retreat away from it all.
No matter how personal everything had become, she did try to suppress her feelings of resentment toward them and the feelings that could be projected onto them from her trauma.
If she let those feelings take hold of her then it was unlikely that she would have been able to control herself.
If she could not control herself during such a time then she would lose sight of her goal and would not be able to achieve what she had set out to do.