Probably the same reason why the craziest Atheists who want to outlaw religion, because they are crazy and don't understand the U.S. Constitution. If you don't want to hear about someone, stop talking about them and you'll hear less. I like this article in the AlterNet, (perhaps the only article I've ever liked by the AlterNet) because Valerie Tarico takes on fundamentalists from all religions. Not just Evangelical Christians, which is what today's so-called Progressives (the Far-Left really) only focus on. "Christian-Conservatives, are evil bigots, because they put down women and gays. Conservative-Muslims, are good decent people, who are simply misunderstood. And when they do and say bad things, it's America's fault." Which is generally the attitude that you get from the Far-Left. Which is what the AlterNet is, a social democratic if not socialist publication on the Far-Left. But with what you get with Valerie Tarico, is religious fundamentalism is bad. Even it comes from non-Anglo-Saxon Protestant males.
If religious fundamentalism and bigotry that comes from religious fundamentalism, is a bad thing like gays aren't real humans, or are mentally handicapped, or women's place is in the home, etc, then religious fundamentalism is bad period. Doesn't matter the religion, the race, ethnicity, or color of the people. If you're going to put down the Christian-Right when one of their members murders a man simply because he thought that guy was gay, because he had a feminine voice and demeanor, then you can't defend that sam behavior when it happens in Saudi Arabia. Where gays are put to death by their own Islamic government. This shouldn't be about race, ethnicity, color, or a specific religion. Unless you're simply bigoted about one race, ethnic, or religious group. To coin a phrase from the great movie about Watergate All The President's Men, "follow the money." Or in this case follow the bigotry. When the Christian-Right behaves badly, sure! Go after them, but when Islamists behave badly, don't call people who criticize that behavior bigots simply for criticizing bad behavior.
Stupid people, unfortunately come in all shapes, sizes, colors, races, ethnicities, religions and genders. Which makes them harder to deal with, because they can hit you at anytime from anyone. No race, ethnicity, religion or gender, has a monopoly on stupidity and bigotry. Which is too bad, because it would be easier to deal with and eliminate. "Hey, now that we know what all stupid look like, lets just focus on them and put the bigoted morons away." You can't do that with a mental disease like stupidity, simply because we don't have enough prison and hospital space to house all of those morons. And given these facts when you just concentrate on the bigots from one religion and race of people, while you ignore the bigots from another religion which just happens to be the largest religion in the world, being Islam, you give away get out of jail free cards to a lot of people. Who are just as bigoted as the Christian-Conservatives you don't like. Which is stupid in itself.
HBO: Real Time With Bill Maher- Fighting Fundamentalism