Try this angle

Our friend is actually a disinfo and psyop agent. Only objectives are to discredit healing modalities, cause distrust, confusion, fear, dissemination, and obtain information to report back to agent's company. This site's IPs, user names, messages, posts, and information is tracked, logged, and studied to identify real people on the other side of the screen. Due to the politically involved nature of many CZ forums, it is monitored heavily under current surveillance laws. Agents often come in a few months or years prior, appear to be interested, then turn around causing all sorts of problems. Much agent work is collecting information and seeming legit, unlike the displayed behavior. However, if there is little to no case, disruptive behavior takes place. If allowed, it continues.

If said friend is not an agent, then, well, our friend is acting like one. The incessant appeal to ignorant arguments warrants a ban, especially since TOS is violated repeatedly.