Islam does not believe in the trinity. The quran says : Surely, disbelievers are those who said: "Allah is the third of the three (in a trinity)." But there is no ilah (god) (none who has the right to be worshipped) but One Ilah (God -Allah). And if they cease not from what they say, verily, a painful torment will befall the disbelievers among them.
( سورة المائدة , Al-Maeda, Chapter #5, Verse #73)
CHrisitiantiy believes in the trinity. (Holy ghost, the father, and the son)
Islam believes that Jesus (as) was a prophet and a slaveofgod . The quran says
in surah nisa " 4:172. O People of the Book ! exceed not the limits in your religion, and say not of ALLAH anything but the truth. Verily, the Messiah, Jesus, son of Mary, was only a Messenger of ALLAH, and a fulfillment of HIS word which HE has sent down to Mary, and a mercy from HIM. So believe in ALLAH and HIS Messengers, and say not, `They are three.' Desist, it will be better for you. Verily, ALLAH is the only One God. Holy is HE, far above having a son. To HIM belongs whatever is in the heavens and whatever is in the earth. And sufficient is ALLAH as a guardian."
Christians believe that Jesus (as) was crucified.
Islam denies this and believe that he was raised up to the heavens as said in the quran " 4:157. And for their disbelief and for their uttering against Mary a grievous calumny;
4:158. And for their saying, `We did slay the Messiah, Jesus, son of Mary, the Messenger of ALLAH;' whereas they slew him not, nor did they bring about his death upon the cross, but he was made to appear to them like one crucified; and those who differ therein are certainly in a state of doubt about it; they have no certain knowledge thereof, but only pursue a conjecture; and they did not arrive at a certainty concerning it. (surah nisa/ayah 157-158)
3: 55. And Jesus's enemies planned and ALLAH also planned, and ALLAH is the Best of Planners.
Most christains believe that judgement day will take place immeditaly after death.
Islam believes judgement day will take place at the end of the world.
Islam believes All mankind is born pure and he/she is responsible for his or her own sins and not someone else's.
Christians believe in Original Sin, (all of mankind is held responsible for the sins of Adam and Eve) which only the sacrament of baptism in the name of Christ can expiate.
Ill post more i have to pray maghrib now

kay: