The less people communicate, the more misunderstandings and animosities there will be which will ultimately lead to Many Bad Things(tm).
Recently, people are greatly incentivized to join a group and excommunicate those outside of it. This is a problem if it goes beyond superficial things like Windows vs. Linux, into things like culture and politics.
I'm surprised and saddened this needs to be explicitly stated here of all places.
Any particular reason why?
(Besides the unproven and possibly wrong notion that it will promote peace, etc.)