Neither of the posters said the parents were responsible for the childrens’ injuries or murder.
However, I have to wonder at the idea of taking such small children to that sort of movie myself or having them out at that hour. You are free to disagree, but having raised 3 boys I do have some experience. Mostly it is laziness and cheapness. But kids require one to grow up and think of someone other than yourself. Our culture does not prize that.
No, I feel terrible for the parents, and they are not to blame for the violence that happened to their children. However, I would always counsel parents not to take small children to movies like this or to have them out in the middle of the night when they should be home in bed. Sometimes being a parent means making hard choices, even not getting to see a movie they “really wanted to see”.
I don’t disagree with you, but there seems to be just as much derision being directed at these parents as the murderer.
In the end, this decision isn’t a big deal. Yes, there are more responsible ways of going about it, but that doesn’t drive some notion of culpability on their behalf. They just went to a movie.