We preach only through nature and its behavior, and present the Qur'an and authentic hadiths as support because nature is 100% neutral and acceptable to all Muslims and non-Muslims.
Books and religious leaders are not acceptable to all human beings, so religious differences could not end with them and religious wars have been going on for centuries, although it is written in all books that God is one, but we all humans could not discover the name of this one God.
Did nature tell what is the name of one true God?
Indeed, nature has revealed that the name of the one true God is only "Allah".
