Why the Internet and society itself is so divided nowadays ?

You're a {slur} for believing such {op's source}.
Real {imagined good guys group} like me know the truth and we're better than {punching bag other group}.
{slur} {slur}!
Others are always in bad faith, but not us, duh.

At least that's how it looks like looking at the reports I get.
So many people talk at each other rather than taking to each other.