The scripture is clear, this in not really up for debate. Like unblackmetal.. has pointed out, we are told to "Hate Evil", not just in that one verse, but in countless scriptures in the Word of God.
The devil is not made in Christ's image. The devil, like all fallen angels cannot be saved, they are damned already; and I would say that the scriptures are quite clear about this. He is trully our enemy, not men, but the principalities of darkness in this world.