Swami Vivekananda critiqued Mohammed from the standpoint of  spirituality.To quote the Swami Ji : "The Yogis says there is a great danger in stumbling upon this Superconscious state. In a good many cases there is the danger of the brain being deranged, and , as a rule, you will find that all those man, however great they were, who stumbled upon this super conscious state without understanding it, groped in the dark, and generally had, along with their knowledge, some quaint superstitions. They opened themselves to hallucinations. Mohammed claimed that the Angel Gabriel came to him in a cave one say and took him on the heavenly horse, Harak, and he visited the heavens. But with all that, Mohammed spoke some most wonderful truths mixed with superstitions. How will you explain it? That man was inspired, no doubt, but was not a trained Yogi, and did not know the reason of what he was doing. Think of the good Mohammed did to the world, and think of the great evil that has been done through his teachings, mothers bereft of their children, children made orphans, whole countries destroyed, millions upon millions of people killed."According to Vivekananda, Mohammed, like many untrained people in the spiritual life, upon having a spiritual experience jumped to the conclusion that he had the Word of God, and that the world should follow the religion God had revealed to him . Whenever a prophet got into the superconscious state by heightening his emotional nature, he bought some fanaticism also,some superstition which injured the world as much as the greatness of his teachings helped.