I think the takeaway is that when you set up a group within your organisation to promote 'inclusion' or 'diversity' you open the door for entrism by seasoned radical activists who have an agenda. An attempt to include 'marginalized' people by excluding everyone who fails there ideological purity test is simply a witch-hunt tactic to consolidate power and subvert the direction of the organisation.

everyone has to be more diligent to protect there projects and communities form these corrosive people.

https://en.wikipedia.org/wiki/Entryism