Banning Trump's social media accounts wouldn't require bias against him, it would simply require him to stop receiving special exemption from platform rules.
Specific individuals aside, the point was to explain that Bosworth was talking about how Facebook shouldn't use it's platforms to benefit the candidates of their preference.
People are downvoting this, but it's just a matter of fact. Jack Dorsey has repeatedly said that the "newsworthiness" of Trump's tweets outweighs the ordinary standards of propriety that get applied to other people's tweets. Somebody asked Jack point blank whether Twitter would take action if Trump made a tweet explicitly asking his followers to murder a journalist, and Jack's response was, "We'd certainly talk about it." (https://www.washingtonpost.com/nation/2019/01/18/would-calli...)