The Sodder kids... How plausible is it that all of them burned so completely that not a single bone remained? I've heard that it would take 2,000°F heat sustained for 2 hours - now assume that for 5 kids.
On the surface, it doesn't seem out of the question, because the house burned for 8-10 hours (I think). It also seems odd that they could have been kidnapped without anybody noticing (especially the mother, who was awakened every half hour). To kidnap 5 kids out of the 2nd floor of a home, it's safe to assume that there were at least 5 burglars, walking up creaky stairs, snatching all of them without any screaming.
One of the two scenarios had to have happened, but both would require highly unusual scenarios - then again, that might be why it resulted in such an unusual outcome. (I don't buy the theory that the only Sicilian Mafiosi who were loyal to Mussolini happened to be in Fayetteville, WV, though.)