Earlier quoted context omitted.
Exactly, if you restrict access based on degrees of separation, you're essentially restricting access to information by geography, which is sure to reinforce regional differences and radicalize people further by hiding dissenting opinions
Pre social media, we lived in a world where information was generally separated by geography. Your comment suggests that by returning to such a state, it would result in increased radicalisation. The implication is therefore that social media has decreased radicalisation. I’m not sure I agree.
For those with open minds, it's allowed them to learn new things from people far away with very different ideas.