I picked what I thought were highlights of the article. Harsh words used to describe Jehu's actions ... likened to how elders should be in eliminating threats in the congregation and how all should treat the disfellowshipped.
JEHU Champions Pure Worship - Watchtower 11/15/2011
JEHU was a champion of pure worship. In carrying out his role, he was energetic, prompt, relentless, zealous, and courageous. Jehu manifested qualities that we would do well to imitate.
Jehovah decreed the elimination of the whole house of Ahab, including Jehoram and Jexebel. Jehu was to spearhead that action.
Though the thought of violence is unpleasant, we should realize that in those days, Jehovah used his servants to carry out his judgments.
Today, no servant of Jehovah uses physical force against opponents of pure worship.
But to rid the congregation of potentially corrupting influences, Christian elders may have to act with courage similar to that of Jehu. (1 Cor. 5:9-13) And all members of the congregation need to be determined to avoid company of disfellowshipped individuals. - 2John 9-11
It is true that Jehu spilled much blood. Yet, the Scriptures present him as a courageous man who freed Israel from the oppressive domination of Jezebel and her family. If any leader of Israel was to succeed in doing this, he had to be a man of courage, determination, and zeal.
No doubt you can see that circumstances faced by Christians today require that they manifest certain qualities possessed by Jehu.