Mohammed, inspired by the angel “Gabriel” to speak for Allah, is he who denies Jesus Christ, preaching another “Jesus Christ” who escaped the crucifixion as replaced by Judas, has no divine Sonship with Abba, all in a context of self-salvation by good works that has no need of God’s grace and mercy flowing in and through Jesus Christ and His atonement, no need to obey His law of love.
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 4:157-8 (Yusuf Ali)
Who is the liar? It is the man who denies that Jesus is the Christ. Such a man is the antichrist–he denies the Father and the Son. No one who denies the Son has the Father; whoever acknowledges the Son has the Father also.
1 John 2:22,23
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.
1 John 4:2-3