Question 247: Who are the People of the Book nowadays? Christians (the crusaders) believe in the Trinity, so they associate others with Allaah in worship. The same applies to the Jews who killed the prophets and fought Prophet Muhammad (peace be upon him), they also claimed that they are Allaah’s beloved people and said: The hand of Allaah is chained. Please enlighten us, may Allaah give you the best reward!
Answer: The People of The Book are the Jews and Christians, even if they were Mushriks at the time of the revelation of the Qur’aan to Prophet Muhammad (peace be upon him). Aspects of their Shirk are stated by Allaah (Glorified be He). The Christians deified Christ (peace be upon him) and worshipped him along with Allaah. Allaah (Exalted be He) says: Surely, in disbelief are they who say that Allaah is the Messiah, son of Maryam (Mary). Likewise, Allaah states that all the people of the Book have taken their scholars and monks as lords besides Him and that the Jews said that `Uzayr (Ezra) is the son of Allaah. Allaah (Exalted be He) says… read more here.