There's a few erroneous assumptions underlying this statement.
The first is that God made these people so they inherently would think they need to cut off pieces parts to be "whole." That is false. God created mankind to be perfect. We willfully discarded that in favor of sin, and humanity brought on itself the penalty for sin. The Old Testament account of Genesis indicates that the penalty is death and being cast out of the Garden of Eden into a world of decay and corruption. This means that even if there is a corrupted genetic makeup that causes some to have a predilection for rape or adultery or murder because of high testosterone levels or the so far fictional "genetic" tendency to sexual attraction to the same gender, it is still a sin to act on that predilection. It doesn't matter if society has spent 30 years trying to pretend that sexual sin is not sin because our biology makes it difficult for us to stop ourselves. All sexual sin is still sin, and the blame for that sin is solely on us, not God.
Second, very few people seem like evil people to me. Two of my former bosses come to mind, but for the most part the human definition of evil requires murder, genocide, or unconstrained sociopathic actions. That's part of how we convince ourselves we're going to Heaven when we're still trapped in our sin -- every person on the planet thinks that "I'm a pretty good person. And I'm not evil like those people." But that's not God's standard. God expects perfection. Because of our corrupt natures, we can't achieve that on our own, which is why Christ died in our place. Being a Christian doesn't mean you don't sin; it means, among other things, that you accept that Christ died as a payment for your sins and intercedes for you so that your sins don't condemn you before God.
Third, no one ever said to stone them or even punish them. I would have no problem shaming them or confronting them with the sinfulness of their actions, but it's the sin that's the problem and not the sinners. They deserve our prayers.
If you're already a Christian, you can just ignore this. But I truly hate the fallacy that "God made me this way, so however I act in conformity with my appetitive nature must be ok."