Look at they ignore the solid science behind the fact that men on average or better than women at math or just about any sport even when strength is not important. Try discussing the IQ differences among the races and suddenly IQ is a meaningless measure. Look at the mountain of evidence that shows a two parent household is better for kids.
You are right about the hypocrisy you just picked the example. In fact that works better to show how little religious conservatives care about science when it challenges their belief system. By brother-in-law firmly believes the Earth is less than 10,000 years old and sorry that is just crazy and ignores not only science but common sense.