In the communities I participated in in the 90's, although most of them were left-leaning politically, people with different opinions were welcomed. People want

In the communities I participated in in the 90's, although most of them were left-leaning politically, people with different opinions were welcomed. People wanted to hear counter arguments and they wanted to hear the other side of the story. As far as I can tell, that is all gone now. People with unpopular opinions just get banned immediately. Sometimes it is the same exact people in the exact same communities who 20 years ago would have wanted to hear that unpopular opinion. I don't know if the cause is that they have been trolled one too many times, they just got older and changed, something in the culture, who knows. The big sort keeps getting bigger though.