Just one other angle on this. It is bad because it is a gross misrepresentation of the Christian message of the Bible and even more so, the life and message of Jesus Christ. This understanding is a largely, but not exclusively, an understanding of the Christian faith in the US. It is bad for America and for the Christian faith.
Creationism is based on a religion that worships an inerrant Bible at the expense of the life and teachings of Jesus.
He has told you, O man, what is good ; And what does the LORD require of you But to do justice, to love kindness, And to walk humbly with your God.