I'm not sure if you're legally bound not to say certain things by the terms of the NDA you signed, or if you've simply chosen not to share some details. But I read that entire page, and who is in the wrong in that story hinges entirely on the exact events of the day you requested to go home, and exactly what you said that was considered a death threat. The extreme vagueness around those details leaves me with no ability to form an opinion on whether your manager is a whip-cracking sociopath, if you have serious anger management issues and are blaming the consequences of them on anyone but yourself, or somewhere in the middle.

Are you willing to give more details?