Lol, the official stance of the website is neutral because the website is manga + forum not politics. We are free to discuss in the forums because mangadex forums are just a forum; only rules are really be civil.
The staff are entitled to their individual no better than you are entitled to your opinion, anger and pov. Sure you can have racist, sexist or superiority pov or even optimistic, idealistic and altruistic; it might be not be liked and get trashed on... But the beauty of discussion is that you can talk and you can listen to different povs rather than heading to your local echo chamber.
The staff have their own opinions but they aren't moderating opinions against their own. There is still a free discussion. You can criticise their personal view but you can't criticise letting the website be neutral and neither can you criticize them for having a personal opinion because they are staff. Would you rather they shut the website down for a few days in the name on BLM like other businesses have done for PR and make their stance known in an official way?