This phenomenon social media is tapping into is far older than cable news. Tent revival preachers tapping into xenophobia and hate on supposed moral grounds date back well over 100 years. I'd expect you have similar feverish preaching by some charismatic leaders who don't believe a lick of their own creed their sheep flock to since we first had enough language to actually think in these terms. Good luck finding a counter for something that seems to be wired into our nature.