The charge against him is specifically "Stealth canvassing", which, beyond the use of the word "Stealth", is clarified several times as:
"""Stealth canvassing: Contacting users off-wiki (by e-mail, IRC, or Discord, for example) to persuade them to join in discussions (unless there is a specific reason not to use talk pages)"""
Between calling it "stealth" and specifically calling out email/IRC/Discord, it makes it pretty clear that it is not referring to public platforms.
Iterpreting it as a ban on any public discussion of Wikipedia by Wikipedia editors, anywhere on the public internet, is a very dishonest move by the people involved in that thread, and you can tell the real reason for it by reading the many comments simply lobbing politically charged accusations against him.
Seeing folks over there policing violations of taboos that are enforced by a very small minority of the English speaking world (around 15-25% of the US for the combined equity-progressives and further left groups) makes me worry about this wonderful site, which has taught me so much over the years :(
