But where you are mistaken is in thinking that God planned that for Pharaoh from the day he was born. It does NOT say that. Scirpture has a number of examples of God giving people over to their wickedness and hardening their hearts only after they had first rejected Him and hardened their hearts towards Him. God does not just arbitrarily create people for the purpose of using them for certain purposes and then later causing them to suffer torment for eternity for no reason. Scripture never teaches such a thing.Men like Pharaoh, whom God raised up so He could destroy him, and through this His power is shown and His name is declared throughout the earth? God hardens the heart of a man (Pharaoh) destined for the eternal flames so His glory will be displayed in all the earth.
It does not say he was created for that purpose. Did God just randomly pick Pharaoh or did it have something to do with the fact that Pharaoh was already evil and rebellious against God? He was already treating God's people cruelly well before God ever hardened his heart for the purpose of displaying His power and making His name known.So why are you so upset to hear that God uses that old serpent, called the Devil and Satan to display His glory, mercy, love and grace to His elect? Satan, like Pharaoh was created for destruction.
But He doesn't do so arbitrarily. That's where your thinking goes astray by acting as if He arbitrarily has mercy on some and hardens others. No, He always has mercy on people who have humbled themselves and submitted to Him and He only hardens those who have hardened their own hearts against Him. You will not find even one example of God hardening someone's heart who did not already harden their own heart towards God. Just read 2 Thess 2:9-12 and Romans 1:18-32. You won't see a description of God giving people over to wickedness and sending them strong delusion for no reason there. It clearly shows that He does that in response to willful rejection of Him and His word.God will have mercy on whom He will have mercy and He will harden whom He wills.