Don’t have the energy to do the due diligence here and I won’t just trust the headline because I have never heard of this source before. But I will note OP’s account seems to be a single issue account with a grudge against wikipedia.
Single-purpose shared accounts are good for security purposes, particularly if you want to expose a problematic organization whose members will stop at nothing to harass, stalk and even doxx you.
While by Wikipedia’s nature, nobody can precisely claim to speak or act on behalf of the site as a whole, Gerard comes about as close as anyone really could. He’s been a volunteer Wikipedia administrator since 2004, has edited the site more than 200,000 times, and even served off and on as the site’s UK spokesman.
....in addition to volunteering as a Wikipedia administrator, Gerard is the system administrator and owner of the Twitter account for RationalWiki
Wikipedia ties with RationalWiki is a cause for concern
Yup. Unfortunately it's far from an isolated incident. The surface is barely being scratched. This page back on Reddit has more Wikipedia scandals which you should know about.