I think a part of the problem is that the programming field is immature and flubby with ideology masquerading as principles. I think the programming field inadvertently trains us to become ideologues and engage in behaviors reminiscent of sectarian religious conflicts of the past.

and a lot of us have seen firsthand how homogenized groups of developers have mistreated people from outside their narrow social experience...that can cause people to falsely attribute things to the outsiders.

Sure. I think one such event at Google recently was widely covered in news media, though it was ideological narrowness, not social narrowness. I saw a whole bunch of false attribution across social media.