The way I like to think about it is that social media has acted as a magnifying lens for many aspects of social interaction, for both positive and negative. The positives include greater sharing of knowledge, better lines of communication with relatives, easier capacity to organise and protest… but the negatives include what you’ve described: bigotry and social division, commercialisation, and exploitation of the dopamine-reward system for profit gain among many others. It’s brought together some amazing people but has rewarded some abhorrent behaviour. Social media has both intensified and distorted our social interactions.