Fuck that guy. Seriously if someone is in silo mode for a month I am going to fire that guy. He is doing either some dangerous changes, which is not acceptable

Fuck that guy. Seriously if someone is in silo mode for a month I am going to fire that guy. He is doing either some dangerous changes, which is not acceptable OR he is doing something that could be walled off by feature switch and integrated with at least weekly commits. If it was some manager that told him to do that, fire that manager too!