One aspect overlooked is that social media interactions are largely faceless and very often completely anonymous. The "other" is just an avatar voicing an opini

One aspect overlooked is that social media interactions are largely faceless and very often completely anonymous. The "other" is just an avatar voicing an opinion on the screen that either fits with ours or not. This greatly exacerbates the filter bubble. Compare this with interactions between live people standing next to each other. Twice as much communication is available via non-verbal cues, and we get a much better sense of who they are and where they're coming from.