WHAT IS TRUE LOVE. LOVING THOSE WHO HATE GOD?
There are some who believe that the entire Doctrine of God consists of love; in loving the entire world. They believe that all of the requirements of God for human beings are based on loving the entire world. That is why there are people that claim to love even the worse murderers, and they believe that this is what God commanded. But in this verse we see that King Jehoshaphat is scorned by God through the prophet Jehu son of Hanani, for loving those who hate God.
Very clearly God announces to King Jehoshaphat that for loving those who hate Him, the anger of the God's presence would be on the king. We can draw the conclusion from here that we should not love those who are God's true enemies. One could love someone who because of ignorance detests God, but not one that with perfect understanding of everything, hates God. Would it then be logical to love Satan and his demons? By chance would it be logical to pray for them? Would God agree with such an attitude?
And Jehu the son of Hanani the seer went out to meet him, and said to King Jehoshaphat, 'Shouldest thou help the ungodly, and love them that hate the LORD?' Therefore is wrath upon thee from before the LORD. (II Chronicles 19:2)
Evidently, it is not the same to be an atheist, that an anti-God. It is to say, it is not the same a person who does not love God, or is indifferent toward God, that one who hates Him.