“Some of the People of the Book are a nation upstanding: they recite the Signs of God all night long, and they prostrate themselves in adoration. They believe in God and the Last Day; they enjoin what is right and forbid what is wrong and they hasten to do good works. They are in the ranks of the righteous.” (Quran 3:113-114).
Re: On Pluralism
read the penultimate verse in the same surah...
"And there are, certainly, among the People of the Book, those who believe in Allah, in the revelation to you, and in the revelation to them, humbling themselves before Allah: They will not sell the Signs of Allah for a miserable gain! For them is a reward with their Lord, and Allah is swift in account." (v.199)