Today's Gospel reading was about "the one who is forgiven much, loves much". Thus, it is necessary to seek and obtain forgiveness in order to grow in love. I used to think that if you loved much, then you'd be forgiven much, but that's not how God works.
So, if someone doesn't get forgiven, or even think they need forgiveness, is it any wonder that their love is small?
That seems to explain the constant stream of hate that is coming from the lunatic fringe.
That should serve as a warning to ALL of us.