Here are three verses of Surat (Al Nisaa) in the holy quran related to Christians (part 1/3)
 O People of the Book (Christians)! commit no excesses in your religion: nor say of Allah aught but the truth. Al-Masih 'Isa the son of Maryam was (no more than) A Messenger of Allah, and His Word, which He bestowed on Maryam, and a Spirit proceeding from Him: so believe in Allah and His Messengers. Say not "Trinity": desist: it will be better for you: for Allah is One God: glory be to Him: (far Exalted is He) above having a son. To Him belong all things in the heavens and on earth. And enough is Allah as a Disposer of affairs.
Al-Masih (Jesus) disdaineth not to serve and worship Allah, nor do the angels, those nearest (to Allah): those who disdain His worship and are arrogant, He will gather them all together unto Himself to (answer).
But to those who believe and do deeds of righteousness, He will give their (due) rewards, and more, out of His bounty: but those who are disdainful and arrogant, He will punish with a grievous penalty; nor will they find, besides Allah, any to protect or help them