I completely sympathize with his abuse story. But it is vital for victims to understand that if and when they sin, they are 100% guilty and responsible regardless of their past. God won't be handing out get-out-of-sin-free cards to anyone (aside from those who with repentant faith, confess Jesus as Savior and Lord of their life). Everyone has a story about how they were wronged by others because we live in a world packed full of sinners. Accept the blame for your own sins. That's the only right response.
Your post reminds me of something: