Rees Mogg is a cretin. If people follow his advice, more would die. I can just imagine him, in his suit with his son, battling through thick toxic smoke down 20 flights of stairs in the pitch black, saying "come on boy, well walk out of this in no time, ignore the silly firemen!" while quickly succumbing to the fumes and passing out on the 16th floor. ****.
But, you have to remember, everything they do and say, there's a reason. Maybe he is just creating an illusion that it is not the local government's fault, but a failure of both the emergency services and the people in the tower. Or maybe he just knew that by saying it, it would all people would talk about for a few days, and the whole Russian spy in no.10 thing will blow over. Either way, diverts attention from the real problem of a failure of the Tory party to properly govern.