:You can remain neutral while and tell the truth at the same time. You can't write "Hitler was an evil bastard" but you can write "Scholars generally recognise Hitler as being the most evil bastard to have lived" and provide a good reference. If you write an article on a terrible person truthfully, you don't need to break neutrality and call them the asshole, because the article's details of their beliefs will make people relise just as easily that someone is an evil bastard. Cheers,  

Toxicity label: insult