500 years before the Birth of Islamic-prophet Muhammad, Apostle Paul wrote this - I know that after my departure fierce wolves will come in among you, not sparing the flock - Acts 20:29
And even 1000 years before building the dome of rock, Apostle Paul wrote this - for this Hagar is Mount Sinai in Arabia, and corresponds to Jerusalem which now is, and is in bondage with her children - Galatians 4:25
Today the most controversial location in the world is the rock of dome, once the Temple of Solomon stood there, And Jesus Christ spoke about this place - O Jerusalem, Jerusalem, the city that kills the prophets and stones those who are sent to it! How often would I have gathered your children together as a hen gathers her brood under her wings, and you were not willing! See, your house is left to you desolate - Matthew 23:37-38
And Jesus Christ also mentioned that until his second coming it will be a desolate place - For I tell you, you will not see me again, until you say, Blessed is he who comes in the name of the Lord - Matthew 23:39
So what is standing over the rock of dome is a desolation, the word desolate is used for referring deadly deserts where people will starved to death, this tells the dangerous of Islam which leads many to the eternal death.
The core theme of Quran is Jesus Christ did not die on the cross, Once Apostle Peter brought this idea to Jesus Christ - From that time Jesus began to show his disciples that he must go to Jerusalem and suffer many things from the elders and chief priests and scribes, and be killed, and on the third day be raised. And Peter took him aside and began to rebuke him, saying, Far be it from you, Lord! This shall never happen to you - Matthew 16:21-22
Christ response confirms how dangerous the theme of Quran is - But he turned and said to Peter, Get behind me, Satan! You are a hindrance to me. For you are not setting your mind on the things of God, but on the things of man - Matthew 16:23
Denying Christ's death is basically denying God's love towards us - but God shows his love for us in that while we were still sinners, Christ died for us - Romans 5:8