In Matthew 25:40, Jesus said, "whatever you did for one of the least of these brothers and sisters of mine, you did it to Me." I have always understood that helping the "least of these" was in reality helping Jesus. Recently I have come to realize that when I judge or criticize my brethren I do it to Jesus Himself.
When God looks at His children today, he sees billions of people selfishly divided and opinionated. He sees people who were created in His image to be like Him, to love mercy and do justly and walk humbly. He sees people who claim to follow Jesus and yet can't see when He, "the least of these", needs their help.
We as Christians have been given a message to spread around the world, but we have failed. We have passed judgment on many of those around us. We say "they don't deserve the love of God; they don't deserve my time, because they are no good.
We need to look into the mirror of God’s law and see ourselves as we really are instead of spending our energy judging others. When we judge or criticize our brethren we do it to Jesus Himself. The good news it that our God is patient with us. 2 Peter 3:15 says, "Remember that we are saved because our Lord is patient".