https://www.siliconvalley.com/2020/05/30/zuckerberg-finally-explains-why-facebook-is-doing-nothing-about-trumps-posts/

Facebook CEO Mark Zuckerberg explained Friday night why his company would take no action on posts in which President Trump threatened “looting” in Minneapolis would lead to “shooting.” That explanation came roughly 16 hours after Twitter did take action and despite Zuckerberg’s having previously told Congress that posts inciting violence would not be tolerated on Facebook.

“I know many people are upset that we’ve left the President’s posts up,” Zuckerberg wrote in a Facebook post.