They said the core of Islam was the belief in tawhid: the unity, singleness, and universality of Allah. From this, they argued that the Qur’an could not be eternal and uncreated (as the ulama proclaimed) because if it were, the Qur’an would constitute a second divine entity alongside Allah, and that would be blasphemy. They argued, therefore, that the Qur’an was among Allah’s creations, just like human beings, stars, and oceans. It was a great book, but it was a book. And if it was just a book, the Qur’an could be interpreted and even (gasp) amended.