Red Letter Christians

“Red Letter Christians”
Now who in the world would think some group would take a good feature like the red letters of Jesus and make something wrong?

Isaiah 5:20 KJV
Woe to those who call evil good and good evil, who put darkness for light and light for darkness, who put bitter for sweet and sweet for bitter!
Matthew 7:21-23 KJV
21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.