The Quran, like many other eloquent speeches, have organized its words on the basis of their audience’s needs. In this connection, the personality, conducts, belief etc. of the audience have been taken into consideration.
The Holy Quran has addressed the People of the Book in the same manner. Hence, the verses regarding them have different literatures depending on the type of the audience and the occasion in which the verses have been revealed.
Now, in order for us to draw out a general rule from those verses, we must examine all the verses. The details and conclusions can be read in the detailed answer