If I were POTUS, I would not insult, denigrate, or criticize people. I would only comment specifically on events, actions, and topics of discourse in a way that adds to discussion of the events and topics of discourse.
If I were POTUS, I would not threaten violence, even loosely via pictures, against individuals or organizations. The only caveat would be reference to formal foreign policy of the US Government involving military action, such as activity against proclaimed terrorist organizations.
If I were POTUS, I would not try to influence or have other political appointees influence the employment of civil service government employees, such as pushing for firings. Civil service government employees should only be affected by formal job performance, including ethics, not by politics. And the management of their employment is up to their managers and solely judged by apolitical job performance.