Pride: The Great Sin
C.S. Lewis in Mere Christianity calls Pride the "Great sin." To think that you are better than anyone else is the Devil's great cancer, he says. Ah, to be so aware of our great commonality as brothers and sisters, children of God, that we can't help but show anything but love and compassion for others would be so awesome. My pride says, once you meet my standards, then I can love you. Love says, there's no measuring stick, we are all in this together. However right (or better) I think I am, might simply be an indicator of how wrong, and prideful, I actually am.
Some people think being principled is more important than being compassionate. Even more tricky is when people think they are being ultimately compassionate when they are simply wanting you to follow their own principles because of the rightness of their ideals.
If you're trying to show compassion and love to someone and they aren't feeling loved, you might be doing it wrong. Trying to change people to be more like you think they should be is arrogant and damaging, and rooted in your pride--convinced of the rightness of your ways. More relationships have been destroyed by doing this than by simply unconditionally loving someone. "Do you have contempt for God, who is very kind to you, puts up with you, and deals patiently with you? Don't you realize that it is God's kindness that is trying to lead you to him and change the way you think and act?" (Romans 2:4)
May we all be one, just as Jesus prayed in the garden in John 17.