>>Stuff like this has always happened.<<
Can you find me one case from 50 years ago where a child intentionally murdered an infant?
They have statics world wide.
I will look and I am sure I can find more than one.
Until then, check out this chart from the Department of Justice. It shows that the rate of infanticide stayed relatively stable from 1976 through 2002.
One more thing. Notice the rate. It is per 100,000 population. For example, 2 per 100,000. The actual numbers range from around 500 to 800 murders per year. I agree it is a horrible crime but when looked at it terms of the total US population, it is hardly epidemic.
This case is from the Pagosa Springs News dated August 23, 1895.