You still don't understand the concept of being on a federated website it seems. What you said makes as much sense as "XYZ on a communist email".

This post was made by a user from mander.xyz (AFAIK not communist), to a community on lemmy.ml (not openly communist either) and you accessed it from lemmygrad.ml (a Stalinist instance that isn't communist either, but lets not have a discussion on that ;) ).