Tbqh or fair, I think it's fine to argue that people are deranged or insane. Technically I think it's meant to anger people and elicit an emotional response, but it's not it should be allowed. The point being that the person who is deranged make a coherent argument. They will make wild emotional points, invent facts, and fail to point to anything. Meanwhile coherent, clear thinking folk will point to factual findings, government publications, details, traditional reporting.
About the traitor accusation: a federal judge used. Yes he later curbed it as legal finding after some prodding from Mueller's staff but that was a finding from a judge on the face of things about Trump's own proposed VP pick, who was his chief foreign policy advisor, and who indeed became White House National Security advisor, Michael Flynn. - And then there is a president who invited the help of a foreign adversary, who got it, celebrated it, promoted it, then tried to tell the American people it had not happened, and even indeed per a recent report certainly seems to have repeatedly tried to cover it up. - I'd agree with the judge in the Flynn case that it's not literally treason, true. But it is something.