I chanced upon this discussion on Jimmy Wales’ page. It is best to read it in full.
I think a fair summary is, one particular Wikimedia Foundation employee was an admirer of Adolf Hitler and alarm bells didn’t ring with his employer.
Or maybe they did? His contract was subsequently ended. However, the lingering impression is, many connected to Wikimedia can’t simply understand what the fuss is about.
Perhaps they should read Wikipedia’s page on World War II casualties and ponder the role of a certain Austrian corporal?
I am reproducing it here in full as a public record, just in case it gets “accidentally” deleted: