I envy no one, nor am I partial to anyone. I am equal to all. But whoever renders service unto Me in devotion is a friend, is in Me, and I am also a friend to him. Although the Lord is impartial, He gives special attention to His devotees. Therefore the Lord says in Bhagavad-gita (4.8):

To deliver the pious and to annihilate the miscreants, as well as to reestablish the principles of religion, I advent Myself millennium after millennium. The Lord has nothing to do with anyones protection or destruction, but for the creation, maintenance and annihilation of this material world He apparently has to act either in goodness, in passion or in darkness. Actually, however, He is unaffected by these modes of material nature. He is the Supreme Lord of everyone. As a king sometimes punishes or rewards someone to maintain law and order, the Supreme Personality of Godhead, although having nothing to do with the activities of this material world, sometimes appears as various incarnations according to the time, place and object.