One might want to put it into "Ripley's believe it or Not" but there was actually a great communication system in place during the 50s and on and if a child were beaten to death, it would get notice very much so. I can't speak so much for the forties as I was younger during the forties and wouldn't have been paying as much attention to the news in particular as I would have later. And, of course, there was only radio and the newspaper.
As a rule, you really knew much more about what was going on within families and neighborhoods than you know now. (warts and all)
There were a number of parents I am sure that took punishment to the extreme then as now. To place the onus on Christianity because one of them professed to be a Christian is just wrong, as well as thinking that those who believe in corporal punishment are into child abuse. In my mind, it is child abuse if you let a child grow up in this society and don't teach him/her to survive and exist within it in a happy, responsible and successful manner, even if you must use corporal punishment to achieve that goal.