Nonsense.
I've been a member of the church of Christ all my life, and what Diddle said is true: you'll find all kinds of people in any large group. Don't judge the whole family by its black sheep.
No "requirements" to marry within. You might some of us a little "off," but it has nothing to do with religion ;-)
You won't find a warmer, more loving, people on earth. Conservative, caring, the kind of neighbors you really want. Bible thumpers? Yep. But in a good way, seeking to follow Jesus and his example.
I have no idea what happened within this poor family, but I hurt for the kids. Looking at his farewell letter in church bulletin from their previous congregation, it would seem that he was perhaps the youth minister at the previous church and maybe moved on to become pulpit minister at the smaller congregation. That would be a career move, and would likely involve more stress and perhaps less money.
As it stands, they can't really refrain from the viewpoint that baptists, catholics, pentecostals, etc, are all in an unsaved state because of problematic verses like that (then again, Mark 16:16 is pretty hardcore about baptism being a necessity for salvation, which is why i think the Catholics stress it as well--their own version of baptism anyway).
I always found it strange that so many denominations baptize as an option only, and many others as a requirement. That fact alone I believe is a primary reason so many non-christians despise organized christianity. Just my 2 and a half cents.