"All this had sprung from my wounded condition, for you humbled this proud man with a wounding blow. My swollen pride got in the way and kept me from you, and my face was so swollen that my eyes were closed." (St. Augustine, the Confessions, p. 169)
You can be many a great many things and defend your hate for enemies: Atheist, agnostic, astrologist, witch, an upstanding member of any number of world religions... you've got a smorgasboard to choose from.
What you cannot be is a follower of Jesus.