Is the intended meaning of believing in the divine books to believe in them at the time of their revelation, before their alteration, or to believe in them after their alteration? And is it permissible to respect the religions of non-Muslims, and what are the aspects of this respect?

Belief in the Books means firm conviction that they were all revealed by Allah with truth and guidance, that they are truly the word of Allah, and that the laws contained therein were obligatory upon the nations to whom they were revealed. Part of believing in them is the conviction that some of them abrogated others, and that some verses of the Qur'an abrogated others, and that no book will come after the Qur'an, and that no one is permitted to deviate from its rulings. Belief in the Books is obligatory, both generally and in detail, including: the Torah, the Psalms, the Gospel, the Scrolls of Abraham and Moses, and the Qur'an. Islam is the only true religion acceptable to Allah. Nevertheless, people of other religions must be treated with righteousness, justice, and kindness, as long as they are not belligerent.