OrphanCrow -
The difference between then and now is that prior to 1980, or thereabouts, someone could disassociate themselves without the enforced shunning that someone today would experience in those circumstances. Plus world conditions probably made it seem considerably more reasonable to make that particular bet and get baptized, with WWI a recent memory and WWII starting in 1939.
Today, world conditions are better than ever and armageddon is clearly nowhere near the horizon. Meanwhile, the punishment for changing your mind is much harsher. This time it's clear that the motivation is 100% control, not some altruistic desire to see these children survive the wrath of the desert god.