Is it permissible to read the book "Izhar al-Haqq" by the Indian scholar regarding Christians without being disturbed, and why did Christians exaggerate about our master Jesus and his mother, Lady Mary (peace be upon them both), and venerate them to the point of worship, even though this is polytheism with God?

The book "Izhar al-Haqq" (The Manifestation of Truth) is one of the most valuable and authoritative books in its field. It is among the most important and beneficial books of polemics for those who need to refute Christianity and invalidate its doctrines. The exaggeration of Christians regarding the Messiah was not an innovation, for polytheism occurred due to exaggeration concerning the righteous. This exaggeration regarding the Messiah did not originate from his disciples but emerged later. The first to propagate it was Paul the Jew, approximately half a century after the Messiah's ascension.