God cannot perform an evil act.
You’ve heard the expression of someone calling down evil on someone else in the Bible. While death can be called “an evil”, God causing a death is not evil. God is only righteous. That means He only does what is right. If God causes the death of a person, it is a righteous act. He has examined their soul and has determined that it the right thing to do.
Our Father’s heart is so expansive, he does not want to harm anyone. He has perfect Love, Wisdom, Justice and Power in perfect balance. But His primary attribute is love. God is love. If He can find a reason to love, He will. God is also mercy. If He can find a reason for mercy, He will show mercy. God is also justice. If he can find justification, He will execute justice. He looks at everything. God is Sacred, and CANNOT perform an evil act. It is impossible for God to perform an evil act because He is subject to His own Laws.
God is love (1 John 4:8). Anything in contradiction to that statement is a Satanic lie.
Requirement for two witnesses in the Bible misused by religious leaders
While the Bible does say two witnesses are required, it also says to be reasonable (Philippians 4:5). Rape and abuse victims do not usually have witnesses. Therefore report all violence done to the authorities and the police as soon as possible.
Philippians 4:5 Let your reasonableness become known to all men. The Lord is near. ~New World Translation
God is love, and He is concerned for victims of violence and abuse and would condemn misuse of the scripture concerning two witnesses. This is likely why He added the admonition to be reasonable to the New Testament.