He is unafraid. He's rich and his livelihood is not threatened. He's got an audience already and being banned from twitter wouldn't affect his livelihood much.

He is unafraid. He's rich and his livelihood is not threatened. He's got an audience already and being banned from twitter wouldn't affect his livelihood much. And he doesn't live in Berkeley so he's unlikely to get his head smashed in, but I wouldn't be surprised if he's had to increase his security measures anyway.