Well the bottom line is that Facebook pushes liberal interpretations of the news. Anyone surprised by this???
It's darker and more sinister than just that. Think of Government + social media + corporations + political groups and activists. The government privately leans on corporations either through the IRS or DOJ, or EPA or similar threats. CEO's are not invulnerable to attacks and removals for refusing to play along. Government leans on social media to control the narrative and direct activists to the scripted campaign to crush opposition on almost anything.