If you're referring to the sentence containing “several members have been affiliated with white supremacy”, it kinda doesn't jive with the fact that their highest leadership position is filled by an afro-cuban man, and the fact that there is no official or de-facto-official Proud Boys public communication of anything regarding white supremacy other than condemnation of it, nor any official or sanctioned actions taken against visibly non-white groups or people.

I mean, if there were white supremacists in the Proud Boys, something that isn't even alleged in that article, surely they would not continue once the group was being led by a man who is like 25-75% black.

The only reason they are being framed so aggressively as white supremacists now, is that Joe Biden mentioned them on the debate stage. Rather than accounting for Joe Biden's ignorance or malice, the media preferred to alter public perception to justify his comments; and it looks like it sorta worked!