[Tenoke]

Pages can share whatever they want. I can create 5000 pages tomorrow to only share Colbert. That's something that Facebook has less control over than what gets seen, and is less relevant at that.

>The thing Facebook's algorithms control is which widely-shared and widely-interacted content

This disproves your point though. According to facebooktop10 most of what is shared is 'right-wing content' yet most of what people actually see isn't. So really, it does kind of look like they might 'discriminate' against right-wing content if they show it less despite being so widely shared.