Islam and Christianity DO NOT share the same god. Muhammad made it VERY CLEAR on this point.
Sura 4:171 O People of the Scripture, do not commit excess in your religion or say about Allah except the truth. The Messiah, Jesus, the son of Mary, was but a messenger of Allah and His word which He directed to Mary and a soul [created at a command] from Him. So believe in Allah and His messengers. And do not say, "Three"; desist - it is better for you. Indeed, Allah is but one God. Exalted is He above having a son. To Him belongs whatever is in the heavens and whatever is on the earth. And sufficient is Allah as Disposer of affairs.
Sura 5:73 They have certainly disbelieved who say, " Allah is the third of three." And there is no god except one God. And if they do not desist from what they are saying, there will surely afflict the disbelievers among them a painful punishment.
Sura 5:116 And [beware the Day] when Allah will say, "O Jesus, Son of Mary, did you say to the people, 'Take me and my mother as deities besides Allah ?'" He will say, "Exalted are You! It was not for me to say that to which I have no right. If I had said it, You would have known it. You know what is within myself, and I do not know what is within Yourself. Indeed, it is You who is Knower of the unseen.
They (Muslims) can't even get the trinity correct even if it is definitely wrong. It is NOT the Father, Son and MARY?? Huh? It's the holy spirit, not Mary.
Also, this kills the possibility that we share the same God.
Sura 19:88-93 They say: "(Allah) Most Gracious has begotten a son!" Indeed ye have put forth a thing most monstrous! At it the skies are ready to burst, the earth to split asunder, and the mountains to fall down in utter ruin, that they should invoke a son for (Allah) Most Gracious. For it is not consonant with the majesty of (Allah) Most Gracious that He should beget a son. Not one of the beings in the heavens and the earth but must come to (Allah) Most Gracious as a servant.
Surah 4:157 That they said (in boast), "We killed Christ Jesus the son of Mary, the Messenger of Allah";- but they killed him not, nor crucified him, but so it was made to appear to them, and those who differ therein are full of doubts, with no (certain) knowledge, but only conjecture to follow, for of a surety they killed him not:
What's really bad is that Muhammad instructed his Muslim followers to read the protected book of the Torah and injeel. What's an injeel, you may ask? That is the Gospel. Since Muslims do not have an Islamic injeel, it must be the Bible! Here are those references.
Sura 5:47 Let the people of the Injeel judge by what God has revealed in it. If any do fail to judge by (the light of) what God has revealed, they are those who rebel.
Sura 3:3 Allah revealed the Quran upon you with you (Muhammed) with truth to confirm what He revealed before it and He revealed the Injeel and the Torah.
Sura 5:110 [The Day] when Allah will say, "O Jesus, Son of Mary, remember My favor upon you and upon your mother when I supported you with the Pure Spirit and you spoke to the people in the cradle and in maturity; and [remember] when I taught you writing and wisdom and the Torah and the Gospel; and when you designed from clay [what was] like the form of a bird with My permission, then you breathed into it, and it became a bird with My permission; and you healed the blind and the leper with My permission; and when you brought forth the dead with My permission; and when I restrained the Children of Israel from [killing] you when you came to them with clear proofs and those who disbelieved among them said, "This is not but obvious magic."
So, this goes to show you that Islam is DEFINITELY not the same God as they lead you to believe. They perform a Taqiyya on the infidels. That's us. It is very difficult to tell if that is not the case. This word means "lying" and it is completely allowed to practice in Islam. Taqiyya - Wikipedia, the free encyclopedia
This is a good example of lying, the Islamic way! Muslim Cleric: How to Lie about Islam - YouTube
These are THEIR WORDS taken right out of their own sources. If these statements I just brought forth are not true, then why are they written so clearly in their books? Just something to think about.