Dream About Family Cult Shooting

My dream was about a family that seemed to be in a cult, where there two younger kids and a teenager, kids in a house by a small drainage revine. They would dedicate an hour of each of their days to shutting off all devices and Essentially going all dark ages even in how they talked. But, one day someone drove up during that time, and busted through the front door and started shooting. The guy was wearing like a Halloween store robin costume. while, the younger kids were pointing out where everyone in the house was. The teenager got pointed out and shot, but it was almost like a vision because it fully played out before going back to the teenager hiding. Since he knew what was going to happen he snuck out of the house before anything started to happen and slid down the drainage revine. He was trying to keep himself hidden looking for the vehicle of the person and when he saw it, and started and he went to call the police, but because they were approaching their dark hour he left his phone behind. After the event he ran in to find the parents dead and the kids nowhere to be found, then I woke up.