People make up an absurdity like the earth (or universe!) is only 6,000 years old, they read that into the Bible and push Young Earth as their central doctrine — then the idea that the earth is 6,000 years old is suddenly more important than Moses, Jesus, everything — then they say you have to believe the Earth is 6,000 years old or you are an atheist. And they wonder why so many young people take that at face value and drop out of church.
I know. Rather than fight to get Christian theology and philosophy presented by making it a part of a required philosopy curriculum and focusing on things like the Ten Commandments and the life of Jesus, they try to force the acceptance of the Book of Genesis as an authoritative science and history text.