I suggest the moderator contact the local police and the FBI immediately, if you haven’t done that already. IMO the political talk blog was fun while it lasted. Like a cancer cell it has metastasized and it appears to be destroying the host. My diagnoses is to excise and remove the topic. Let it fester somewhere else. This is proof of the old adage “never talk religion and politics in polite company”.
Our prayers are with you in finding a resolution to this unexpected nightmare.