Creating immunity for former presidents out of thin air creates the danger of a president completely out of control. To the Chief Justice, however, that is only a minor concern. The real problem that needed to be addressed was the potential harassment of the president after he leaves office, which could force him to govern without the requisite energy.
Roberts probably thinks he can keep Trump within the guardrails, but he doesn’t have any power–only the rapidly diminishing public respect for his office. He stands to be the American Von Papen the way things are going.
Oh, and by the way, Trump reposted some items on Lying Psycho yesterday calling for Liz Cheney and other political opponents to face military tribunals. I wasn’t kidding when I talked about Trump’s Michael Corleone moment; he’s already warning us it’s coming.