The kids I took to our family christmas had the flu.
You took kids who had the flu to a huge gathering of people? Why would you do this to them all?
I hate the family and really want to kill them slowly and painfully.
You have a very sick intention that you want to kill others, but that is something that needs to be addressed by the police. Call them and tell them you have this desire. That is just to prevent an actual catastrophe, you will look better in the eyes of the law rather than terrible if they die.
I blame those kids for catching the flu in the first place. It was their fault.
It really sounds like you are doing a lot of very dangerous and rude things to other people. It may be a good idea to reflect on your own thoughts and find out what is causing you to have all this hatred inside you. Talking to a therapist seems like it would be a fantastic idea to clear your thoughts more.