A point too many people seem to be missing: First Amendment Rights are not absolute. This includes both freedom of speech/expression and freedom of religion. There have been plenty of examples to show rights are limited to acting within the law- and acts that are considered crimes-against-persons are not protected by the First Amendment.
As examples, there have been numerous cases in recent years where parents whose 'religions' taught that basic medical procedures were unacceptable and allowed their minor-aged children to die learned they did not indeed have the 'right' to withhold life-saving medical treatment from their children simply because 'their religions' said so- and were held criminally liable for the deaths; second, there are a half-dozen or so references to individuals who are now serving long prison terms because 'their religions' believe in so-called 'honor killings.' The same approaches should be taken to those who commit horrible abuses against their children- including, but not limited to, the practice of beating two-week-old infants.
Individuals are free to believe whatever they believe- but practices are another matter entirely. No one should be allowed to get away with practices that harm others- especially when the 'others' are innocent children.
I'd wondered about one, specifically, and found the answers in a book titled Stealing Jesus, by Bruce Bawer- the Southern Baptist Convention was taken over by fundamentalists in 1979, resulting in that particular religion bearing no resemblance to 'traditional' Baptist beliefs and practices. 'Traditional' beliefs include the dignity of all persons, freedom of belief, freedom of conscience, the separation of church and state- much different from what's been presented since the 'takeover.' All this flat-out nonsense about 'authority,' 'submitting,' etc. is exactly that- nonsense... until it becomes dangerous.
More interesting information from that particular book: fundamentalism as it is seen today did not even exist when my parents were born- it is that new, that recent. Seems individuals did not like and did not agree with the #1 foundation of Christianity- 'God so loved the world...'- and decided to base their new version on 'wrath.' I was kinda stunned to learn these wackadoodles actually claimed God was responsible for the Kennedy assassination- that the assassination of JFK was 'God's wrath' for the U.S. Supreme Court taking organized religion out of public schools- but it's not much of a stretch from those in the present day asserting 'God hates' various people and groups.
Another book I want to recommend: Churches that Abuse, by Ronald M. Enroth.
And also, to see these 'religious' groups described in the context of cults, the original 1994 edition of Captive Hearts, Captive Minds: Freedom and Recovery from Cults and Abusive Relationships, by Madeleine Landau Tobias and Janja Lalich.
And another biography by a young woman who lived through it: Girl At The End of The World by Elizabeth Esther.
For more information on the cult, and how widespread it has become:
http://www.patheos.com/blogs/johnshore/2013/11/the-foul-toxicity-of-the-8-million-strong-independent-fundamental-baptists-headed-by-bob-jones-university/
http://bn66.com/churches/baptist.html
https://www.babble.com/mom/to-train-up-a-child-teaches-punishment-that-kills-kids/
http://www.blogs.abcnews.com/pressroom/2011/04/a-religious-sub-culture-many-americans-have-never-heard-of-yet-has-thousands-of-churches-across-the-.html