I have one question for you: Why do you conflate Christianity and creationism?
that is a valid question Subduction and deserves an answer.
I will try my best to keep this short...
Genesis = God creates a new heavens and new earth...they are both an extension of, and revelation of his character
Satan attempts to corrupt both heaven and earth and ruins Gods character hoping to overthrow him.
Satan succeeds in corrupting the earth necessitating a plan of salvation from God to answer the charge against him made by satan and satisfying the consequences of breaking Gods eternal law (ie the wages of sin is death)...by dying on the cross for his own creation. Death is a consequence becauser fundamentally, God and evil cannot coexist...for us mortals that is really bad...sinful mortal humans die in the presence of God! And before you go down a rabbitt warren, consecrating oneself just before meeting God overcomes at least the immediate consequence (but not the long term one).
The old testament is filled with narratives explaining why and how God has tried to redirect man back to the pathway of redemption and also predicting what will ultimately happen to those who do not believe and obey Gods word and his laws.
New testament, God incarnate dies for the sins of his own creation. The gospel of how that salvation process works is spread throughout the world.
OK
so given all of the above. I conflate Christinaity and Creationism because they are both in the bible.
The Old Testament Creation account explains exactly how a personal God created man in his own image.
The New Testament shows us how those who follow Gods law and have the faith of Jesus may be redeemed back to God and restored to the sinless state in which we were created.
I woudl suggest that those who do not agree that God created Adam and Eve exactly as he said in the Bible are denying Christianity and the gospel and therefore, reject salvation!