Wow! It says volumes that your uncle cares though they're not speaking.My mom would have done the same, which is part of the reason why they weren't married long lol.
Talked to my son last night, he's stationed in San Diego, and he's going to call them today to see if he can get them to go elsewhere. Plus my uncle (dad's brother who he doesn't speak to) emailed me, worried about them. The rest of the family sees how dangerous this decision is, but we're dealing with a very high degree of stubbornness. At the end of the day, none of us can force them, but we can let them know that we're stressing out due to their decision.
Maybe letting your dad know that even his brother gives a damn what happens to him will make him realize just how dangerous remaining there is?
Where's your step-brother who they live with in all this?
Did he get out of Dodge already?