Social media platforms amplify poisonous ideas when they don't remove comments that share extreme sentiments directed toward Jews, Muslims, Mormons, etc.
There is a big increase in thinking with the mob on social media, as opposed to thinking critically, verifying the information you share, and being an honest broker of information online.
It doesn't take more than five, maybe ten minutes to verify a story before sharing it. Just because something triggers an emotional response doesn't mean that information is true. Just because it confirms your bias doesn't mean it's true.