It's a behavior that occurs among almost all domestic hamsters. In the natural habitat, the male hamster will rut, then leave. The eating of the offspring/litter mates by the parent and each other is likely created by forced proximity in an artificial environment. BTW, anyone who's read a book on the hamsters they are raising would know that scenario would play out. Breeding animals in captivity without even basic research before hand is reprehensible. Jeff should be ashamed.
I was only 8 years old, and they weren't my responsibility. I did state "had as a child" but should have phrased it, witnessed my Mom's hamsters... Either way, what place do you have judging anyone? But I'll leave it up to you to decide which way you feel about your behavior.