People are far more happy to cling to the tribe they choose, and the tribe that has their back, over the tribe they were born to. Then, there are those who see that trend as dangerous to society (where, in many cases, society is really just a proxy for their own power or social status - ironically as viewed through their own chosen tribes more than the tribe they were born to)
That is to say, I don't think it's the political views that are splitting the families. Individuals have decided that care for each other should come secondary to those political views. I feel like there used to be a certain amount of care in the "sweeping under the rug" - it was the tribe against the world, it was protecting the family image as much as it was protecting the individual from society. These days, being a thing "in private" means being a thing alone, and that's no longer a compelling thought when external tribes are willing to embrace you.
Which probably applies to software tribes just as much as family ones.
