You get many so called Christians who tell others that if they do not believe in creationism, they they are not real Christians. People who face this enough leave a church. We know what the bible says about those who chase people away from Him, especially over a misinterpretation over parables that explain why God is better than Babylonian beliefs.
The problem with this thinking, is thusly:
How can one refuse to believe the first few chapters of the Bible, and then claim to follow the very deity the Bible is about?
Okay, some people (including you) say that first few chapters of Genesis are "parables". There's a problem with this, and it lies in interpretation of the ancient Hebrew texts. From the Dead Sea Scrolls, we can ascertain that the Hebrew Texts were copied faithfully (they are very close to present-day Hebrew copies, faithfully reproduced). And from those who study/studied Hebrew, we know that they had certain ways of writing things -- they used different words and styles when they were being literal, and when they were being poetic or allegorical.
Genesis was written in the literal sense. This means the writer of Genesis meant 6 days, as in literally, 6 days. Christianity as its core believes in the inerrancy of the Bible. If you do not believe that the Bible is inerrant, then can you truly call yourself a Christian? If you do not believe the Bible or parts thereof (which calls itself the Word of God written by men, inspired by the Holy Spirit), then are you not calling God a liar?
Wherever parables are spoken in the Bible, the Bible makes it fairly clear that they
are parables. Genesis does no such thing.
What do you think God feels about those who call Him a liar?
What do you think God feels towards those who only believe partially what Holy Scriptures say?
What do you think God feels about those who place their human reasoning above what God has told us?
What do you think God feels about the ability of man to suss out things that he never witnessed and cannot prove?
Isn't Christianity as its core about Faith in God? If you don't have Faith, then can you really call yourself a Christian? At what point do you start actually believing the Bible? Genesis 1 or Matthew 1? If you are willing to believe Matthew 1, but not Genesis 1, on the concept of "Science Says So", then what part of Science proves that Jesus died on the Cross to pay for our sin and resurrected three days after?
If you're willing to use Science to argue against Genesis, then what is stopping you from using Science to argue against Jesus?
And if you're willing to use Science to argue against Jesus,
then why are you calling yourself a Christian?
You're either a Christian, or you are not. If you are a Christian, then you believe in Christ. If you believe in Christ, then you believe in the Father and the Holy Spirit. If you believe in the Father, and the Holy Spirit, then you also believe in what they tell you through Holy Scripture. If you believe in the Holy Scripture, then you believe in
all of the Scriptures, Genesis included.
To disbelieve any of the Bible, or try to reason it away as "it's allegory" or "it's a parable" when no such thing is mentioned in the Bible (again, whenever allegory or parables are told, they are labeled as such), is to call God a liar. One of the main pillars of the Christian Faith is that God is Truth.