People have a way of getting entrenched in their positions/beliefs/opinions, and then take disagreements with them as personal attacks, even at the cost of having to defend positions that are no longer tenable. There's nothing new about this, it's just more readily apparent in our easy access, anonymous online world.
I've been somewhat amazed how people can get worked up into a tizzy about some such issue or matter online that if they really thought about it wouldn't add up to a hill of beans in the greater scheme of things, or doesn't really have much of an impact at all in the true reality of their lives.
We live so much of our lives now in this virtual reality world. I wish we'd all start showing some more real life decency towards each other while we're in it.