Starting from here, there is some disjointed context on that, or parts of the conversation are missing: Questions about Moderation - #188 by kitefreak
Until he takes a more critical view on his own writing, linking to sources and not making overly broad claims not backed by the sources for example, a return to the forum is likely short-lived. I recommended an academic writing course. Also he now is, unbelievably, using an LLM as a scientific authority, so the recommendation for the course stands, with now an extra course on what LLMs are and are not, and can and cannot do:
Also until he takes a more critical view on his own behaviour (he apparently sends out unwanted spam, for example) and hostile attitude (yes this forum is moderated, for example) and apologizes for it, there is no good precondition for his reintegration on the forum. He was met with hostility the last time he came back. An appeal, an apology and a promise to do better, would have helped.