Psalm 101

Many of David's psalms offer the words of a man of sorrows or turmoil. Some of his psalms speak of his sinfulness or God's gracious and loving nature. But in psalm 101 I hear the angry words of a man overflowing with righteous indignation. David seems obsessed with the obliteration of the unrighteous, unjust people who were living around him. People who were receiving the benefits of God's inheritance but rejection God's call for justice among his people. Such rebellion made David's blood boil. My question is; how should Christians apply this psalm to our life? If David was being literal then I don't think we are called to follow his example. But we can and should apply his principles to the rebellious attitudes in our flesh nature. Paul's words in 2 Corinthians 10:4-7 sound equally as violent as David. Yet I see Paul's words directed toward the spiritual battle being waged with the flesh. In that battle we face an enemy toward whom we are to show no mercy.
Stuart