This piece, from Internet Monk, suggests that the besetting sin that people today are failing to notice is homophily, the restriction of our love to people who are like us.
An ethical genius from two millennia ago told us when we ask ourselves who we should love, in other words, who is my neighbor, we have to ask that question from a position of dire need, the kind of need one would be in if one had just been mugged and left for dead on the road from Jerusalem to Jericho. From that vantage point, try thinking that the person who takes care of you is too Samaritan, too feminist, too Republican, too Democrat, too rich, too poor, or too gay, or too immoral, or too illegal, to be my neighbor.