If you declare with your mouth, "Jesus is LORD," and believe in your heart that God raised him from the dead, you will be saved. Romans 9:10
“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.” Matthew 7:21
"Hearing that Jesus had silenced the Sadducees, the Pharisees got together. 35One of them, an expert in the law, tested him with this question: "Teacher, which is the greatest commandment in the Law?" Jesus replied: "'Love the LORD your God with all your heart and with all your soul and with all your mind.' This is the first and greatest commandment. 39And the second is like it: 'Love your neighbor as yourself.' All the Law and the Prophets hang on these two commandments." Matthew 22:34-40
"You have heard that it was said, 'Love your neighbor and hate your enemy.' But I tell you, love your enemies and pray for those who persecute you, that you may be children of your Father in heaven. He causes his sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous. If you love those who love you, what reward will you get? Are not even the tax collectors doing that? And if you greet only your own people, what are you doing more than others? Do not even pagans do that?" Be perfect, therefore, as your heavenly Father is perfect." Matthew 5:43-48
"If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, cannot love God whom he hath not seen." 1 John 4:20
Based on these passages, and the KKK's goals, they're failing to love others (Jesus said to love even your enemies and they're murderously hating people based on ancestry, skin color and/or semantics), love God, are guilty of heresy, murder... they fail the criteria of Christianity as a whole (if any members are truly Christian, they're going the wrong way and need to get out of that group ASAP).