Regarding Those To Whom We Are Unsympathetic
I tried acting for about ten minutes way back when. That didn't stick, but I did pick up a copy of Michael Chekhov's To the Actor while I was at it. Curious about its contents, I just grabbed it off the shelf a minute ago and came across this advice -- advice with relevance way beyond acting.
Endeavor to penetrate the psychology of persons around you toward whom you feel unsympathetic. Try to find in them some good, positive qualities which you have perhaps failed to notice before. Make an attempt to experience what they experience; ask yourself why they feel or act the way they do. Remain objective and you will enlarge your own psychology immensely.