Is god guilty of child abuse with his biblical threats of violence and burning his children in hell fire for enernity?

No, because if you choose God and stay away from sin, you are not choosing hell. God's children have free will and either say 'yes' or 'no' to Him, and reaffirm it or not by their actions. And, by the way, I read not too long ago that the fires of hell actually are not as painful as knowing you will never know God. They actually assuage the pains of hell. It made sense.

God's children are not going to burn in hell, those who don't accept God is their creator /father / saviour will burn in hell.

To be God's child you must be born again, spiritually reborn..