But they are right, the world is only 6000 years old, because the Bible that was written by men, in which those same men wrote, This is the word of God and to doubt it is to commit mortal sin that will ensure damnation.
Problem with that narrative is that it fails completely when we look at the factual evidence.
The earth is round, it is not the center of the universe, there were dinosaurs, evolution took place, human life can only happen by a man and a woman having sex, etc etc...
Sadly if they only appreciated the infinite of our cosmos, they would be one step closer to God because then they would see his or her True infinite Divinity.