Presidential candidate Dr. Ben Carson was roundly criticized last week for his comments about Islam.When asked whether he believes that Islam is consistent with the Constitution, his response was: "No, I don’t. I do not. I would not advocate that we put a Muslim in charge of this nation."Unfortunately for the critics, ridicule, derision, and condemnation are not arguments.They are the last refuge of a defeated thought.As a Muslim — and particularly as a former member of a radical Islamist group — I can state unequivocally that Dr. Carson is correct. Without a single exception, the approved Islamic literature teaches violent principles such as killing apostates, beating women, killing gays, and enslaving female war prisoners for sexual purposes.If anyone doubts this, or wishes to challenge it, they need to prove this to be wrong. If Carson’s critics could provide a single approved Islamic theological book that would undermine his position.If they could point to just one treatise that is accepted by the leading Islamic scholars at Al-Azhar University or the religious authorities in Saudi Arabia (the two Sunni religious bodies responsible for approving a printed Koran) that rejects the traditional barbaric principles of Islamic law.If they could produce a solitary approved Islamic text that stands clearly and unambiguously against killing apostates, beating women, killing gays, and enslaving female war prisoners for the express purpose of raping them — then perhaps the criticism would be justified.But such a text does not exist.In fact, until such a reference is found, Ben Carson is correct. These Shariah values and principles, which are so hostile to the American Constitution, are still an integral part of mainstream Islam.Worse, the aforementioned horrific values are considered “maloom mina aldeen Bil-Darora” (a necessary article of the religion).So if a Muslim were to reject them, under Shariah, he must be considered an apostate (one who has forsaken his religion), and therefore, under the same law, must be killed.In other words, any Muslim who rejects killing gays and apostates, or beating and raping women is no longer considered a Muslim under Shariah. Such rules fly in the face of the Constitution.