Any editor is able to edit any article on Wikipedia.
For all it matters, it might have been you who tagged the article as non-neutral.
Additionally, non-neutral does not mean "full of shit". It just means someone feels that the facts listed in the article, albeit undisputed, might have been presented with a tone that they personally feel is not the right one (i.e., doesn't match their personal opinion or how they personally feel about the ordeal).
Any editor is able to edit any article on Wikipedia.
For all it matters, it might have been you who tagged the article as non-neutral.
Additionally, non-neutral does not mean "full of shit". It just means someone feels that the facts listed in the article, albeit undisputed, might have been presented with a tone that they personally feel is not the right one (i.e., doesn't match their personal opinion or how they personally feel about the ordeal).