Muslims claim to be the rational ones in the world of religion

Muslims claim to be the rational ones in the world of religion. Is it rational to refuse to learn God exists?. Don’t you study to learn?. Is there a rational explanation to the refusal to learn and teach why God exists?. My truth to be understood is atheism is a logical fallacy that assumes God is the religious idea of the creator of the creation to conclude wrongly no creator exists because a particular idea of God doesn’t exist. Thank you.