Anyone who uses their womb as a political weapon deserves to have their children taken away.
This is what they're doing: they realize that the majority of kids are very liberal and are becoming more or less un-Churched. They don't share the same fire-and-brimstone theology as their parents. To counteract this, these people are popping out kids for the Republican Party which is falling out of favor with the young and educated, and homeschooling all 15+ of 'em. Indoctrination, in other words, to fight the "liberal agenda".
I'll never understand how people can honestly devote so much time into halting social progress, to the point of having children for that sole purpose, especially when that social progress very rarely effects them. They hate public schools and public clubs and sports and pretty much everything else that promotes meeting more people and therefore becoming more understanding of different cultures and lifestyles and beliefs. They're still allowed to hold any sort of opinion, and yet it bothers them when certain opinions they once had are exposed as being backwards and downright wrong. The best way to get back at THE MAN for proving your pastor wrong? Pop out 15 new kids and indoctrinate them. Tell them that everybody else is unsaved and evil and that the Liberals are out to get them. Don't let them meet other kids their age unless they were homeschooled too. No TV, no music, no reading, unless it's approved by the parents. Forget the fact that they'll never function quite right socially, and be suspicious and downright hateful of everybody else.
It's okay to have conservative viewpoints, but when they are proven wrong time and time again and you promote them ("Evil-ution is a lie, gays choose to be 'that way', America is a right-Christian theocracy, all Muslims want to blow people up"), you're just contributing to America's rapid ignorance and growing indifference.