Yes, parents are responsible for not pushing to Christianize their public school district if there is violence in their local public schools that leads to the death of their children.
It is the responsibility of Christian parents to make sure that their children are receiving an education that acknowledges that Bible’s morality (such as The Ten Commandments) are respected in their public schools where their children attend.
Negligence on the part of parents to push to have Bible in the public school curriculum is directly responsible for rising violence in their local public schools.
Right now, there can be violence via bombs, knife, guns, poison, etc. perpetrated by public students against other public students, if Christ is not brought back into the public schools of the United States of America.
Parents must understand that they are to blame for not pushing to Christianize their local public schools.
You reap what you sow!