Islam does not acknowledge Jesus in his entirety:

1 John 4:2-3

This is how you can recognize the Spirit of God:

Every spirit that acknowledges that Jesus Christ has come in the flesh is from God.  But every spirit that does not acknowledge Jesus is not from God. 

This is the spirit of the antichrist, which you have heard is coming and even now is already in the world.

Muslims deny God is a Father to Jesus his son:

1 John 2:22

Who is a liar but he that denies that Jesus is the Christ? He is antichrist, that denies the Father and the Son.

Mohammad killed people just to get their wives:

Jude 1:4

For certain men have crept in among you unnoticed–ungodly ones who were designated long ago for condemnation. They turn the grace of our God into a license for immorality, and they deny our only Master and Lord, Jesus Christ.

The law is reserved for those who are not indeed Christian:

1 Timothy 1:8-9

But we know that the law is good, if a man use it lawfully;

Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for murderers,

If you doubt me on these things.

Let’s take a look at the text of Islam to see just how they truly believe:

To them it is not fitting for God to have a son when He did

and Jesus is his name:

They said, “The Most Gracious has begotten a son”!  You have uttered a gross blasphemy.  The heavens are about to shatter, the earth is about to tear asunder, and the mountains are about to crumble.  Because they claim that the Most Gracious has begotten a son.  It is not befitting the Most Gracious that He should beget a son.  –Surah 19:88-92 

Of course we call Jesus the son of God and those that deny that is so is antiChrist:

…the Christians call Christ the son of Allah. That is a saying from their mouth; (in this) they but imitate what the unbelievers of old used to say. Allah’s curse be on them: how they are deluded away from the Truth!  -Surah 9:30

They think he was neither killed or crucified,but just to appear that he did,

when such teachings they believe is antiChrist:

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:- Nay, Allah raised him up unto Himself; and Allah is Exalted in Power, Wise – Surah 4:157

My conclusion is they can claim to tell the truth,yet denying Jesus as God’s son is antiChrist.

Here are Bible verses about a ancient king who said unheard of things against the God of gods:

Daniel 11:36

The king will do as he pleases. He will… say unheard-of things against the God of gods. 

Daniel 7:25

He will speak against the Most High and oppress his saints.  Daniel 7:25