Wikipedia is not a hierarchy. Admins are experienced wikipedians who have a few extra administrative tasks (hence the name). The Admin in question seems to have acted based on their own judgment. (I know because I asked them! https://en.wikipedia.org/wiki/User_talk:JzG#meatball:ExpandS... ) . You could even talk to the admin yourself, if you would like extra information. Wikipedia has a function to add questions to a talk page, and there is a function to send an email instead/as well, if you have questions.

That said, I went looking around, and there appear to be politicians and russian media involved here. This is not a "Evil admin stomps on poor innocent victim" story, for sure.