If you'll look around Horowitz's site, you will see that he has led the way in exposing the entire rotten empire of the pop-culture left for what it really is: a naked totalitarian power-grab. Religious Right buffonery is the number one weapon in the terror-apologist propaganda arsenal, their best opportunity to promote the big lie that they, and not we, promote the principles of The Enlightenment. A good example is this screed from British biologist, terror-apologist, and totalitarian bigot Richard Dawkins, which characterizes the War on Terror as a fundamentalist crusade against Islam and implies that we are no better than the Islamo-fascist enemy.
Your lucid presentation of your position makes it clear that there is no possible area of agreement between those in your camp and those in our camp. Which merely reinforces the original question raised by Horowitz's article: "Is there any way to maintain the Republican coalition between social conservatives and people like yourself?" Your statement implies that the answer is "No." You may be right, but that forecasts a period of turbulence ahead not only for Republicans, but for the Republic.