Digital discussions tend to isolate like-minded people. This selective exposure to those with similar views and biases prompts existing attitudes to intensify.
On the internet, like minds can congregate via social media and through selective exposure to kindred-spirited views—echoing each others’ ideas and attitudes. That can work for either good (as when people find support for coping with health challenges or want to gather for a good cause) or ill (as when people find reinforcement for their hatreds).