As hard as it may be to understand for some, there are times in which family members intentionally stop speaking to each other.
In some cases, it's because one person feels manipulated or abused by the rest of the family. In others, it's because they get the impression they don't actually matter to what would normally be their loved ones and prefer the company of people they know care about them.
And sometimes a family will cut themselves out of someone's life by embracing their own prejudices. And sadly, we can sometimes find that they'll want to build a relationship with the children of the people they've wronged without actually acknowledging that wrongdoing.
But as one dad's story makes it clear, they can't have it both ways.