>Christian doctrine doesn't say people are evil
>they might do evil.
>they are not, themselves, evil
This is one reason why those who pick proof texts out of their context makes for absurdity:
Matthew 7:11 (ESV): If you then, who are evil, know how to give good gifts to your children, how much more will your Father who is in heaven give good things to those who ask him!
If the full range of scriptural data is taken into account, the position one must come to is closer to the one you hold. But if one takes the NT picture of demonology seriously, one must allow that humans may BECOME evil and not merely DO evil. The act originates from the condition of the heart.
Luke 6:45 (ESV): The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks.