Let's stipulate for argument's sake that I am the worst person who ever lived.
Now that you feel better, it still doesn't make your argument hold any water: the criminal is responsible for his own actions - if he takes advantage of the kindness shown to him in order to hurt others, that's entirely his own fault.
Would you blame a surgeon, who saved the life of a man who later became a murderer, for the death of his patient's victim?
Examine your premises.
Mockery and hate is why your church is struggling.