“You shall not misuse the name of the Lord your God, for the Lord will not hold anyone guiltless who misuses his name."
When things are done in the name of the Lord, they are done for his glory. If you read acts, you will see an account of miracles and demonstrations of the Spirit's power all done in the name of Jesus. To use the name of the LORD is to ascribe credit, honor, and glory to him for something done. His is a powerful name, but with great power comes great responsibility.
To misuse God's name is to slander it. If you call yourself by God's name and identify yourself as in Christ, but by your actions you prove yourself still captive to sin, you slander the name by which you call yourself. Do not claim to belong to Christ if you hate your neighbor or practice unforgiveness or judge others lest you attribute to Christ that which dirties his reputation. God's name is his character and reputation and many atrocities have been committed "in His name" both by the Church and misguided individuals.
Christ certainly has no need for those who will misrepresent Him and distort his name because it is by His name we are saved. If the world cannot see his name, how then can it be saved? Those who distort the name of God shut the doors of heaven for all who try to enter in including themselves. (Matthew 23)