Totally, totally disagree, I'm sorry, JM.
Muslims reject the Divinity of Christ. According to the Athanasian Creed, and the majority teaching of Pre-Vatican II Theologians (as related by St. Alphonsus, Fr. Mueller, Msgr. Fenton etc), no one can be saved without believing in the Trinity and Incarnation, and without confessing that Jesus Christ is Lord and God, as St. Paul also implies in many passages in Holy Scripture. Islam not only refuses to admit that Jesus Christ is God Incarnate, but dares to calls it a blasphemy, and that Christians are idolaters, thus reviving and worsening the abominable Arian Heresy. Mohammed also did many disgraceful and sinful things, among them "marrying" a girl of 6 and shamefully consummating it 3 years later when she was just a little girl. That poor, poor, young girl. Almighty God will certainly punish Mohammed severely. The difference between the Life, Love, Example, Heroism and Self-Sacrifice of Jesus Christ and the wickedness of Mohammed is the difference between Light and Darkness.
But the worst thing the False Prophet Mohammed did was trying to destroy faith in Christ's Divinity, in His Redemption on the Cross, and His Resurrection over death from among men. All his other sins and crimes, and they are many, don't compare to that. The teaching of Christ and His Apostles, over and over again, is very clear and very plain: Jesus Christ is the Son of God. These are the first lines in the Gospel of St. Mark, and are repeated as the purpose of the Gospel of St. John near the end. That we may believe that Jesus Christ is the Son of God, and that believing this, we may have life in His Name. Islam, which absurdly claims some different fantasy 600 years later, denies the historical facts about Jesus Christ declaring Himself God's Son. The Eternal Life that God has promised us forever and ever in Heaven depends on faithfully holding the Apostolic Teaching.
Baptized Christians, who believe in Christ and the Trinity, though with some errors, are certainly in a better state than Muslims. All that being said, we are of course to love our Muslim friends, and lead them to Salvation in Christ and in Holy Baptism. But on no account should we ever be confused by the apostasy and infidelity that the claims of the False Prophet Mohammed lead to.
God Bless.