What are you trying to say?
Evil exists in every individual. There are believers who do evil. The only sin or evil that God says ends in death is disbelief. Disbelief separates a person from eternal life - i.e., death.
In the meantime, we are called to love one another. The 2nd greates commandment.
Mental illness is not a manifestation of evil. It is a manifestation of a physical condition of the brain. God isn’t calling anyone to judge someone else’s spritual condition. He says that is His.