Please prove your claim. You refer to his "unchangeable decree". Post what is exactly, and in context of there scripture in whole wherein it is contained, the exact passage of Gods word that denotes an unchangeable decree of God. Thank you. I look forward to your post.
“God is not a man, that he should lie; Neither the son of man, that he should repent: Hath he said, and shall he not do it? Or hath he spoken, and shall he not make it good?” Numbers 23:19 (KJV 1900)
“Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.” James 1:17 (KJV 1900)
“It is of the LORD’s mercies that we are not consumed, because his compassions fail not.” Lamentations 3:22 (KJV 1900)
“But thou art the same, And thy years shall have no end.” Psalm 102:27 (KJV 1900)
“I will not execute the fierceness of mine anger, I will not return to destroy Ephraim: For I am God, and not man; The Holy One in the midst of thee: And I will not enter into the city.” Hosea 11:9 (KJV 1900)
“And also the Strength of Israel will not lie nor repent: for he is not a man, that he should repent.” 1 Samuel 15:29 (KJV 1900)
“For I am the LORD, I change not; Therefore ye sons of Jacob are not consumed.” Malachi 3:6 (KJV 1900)
Etc., etc.