Cho's sister attended Princeton.
Maybe Cho picked up some "pro-death culture" from Princeton's Professor Peter Singer who thinks it is all right to kill flawed babies.
Cho viewed college students as flawed and thought they did not deserve to live.
PRINCETON, September 12, 2006 (LifeSiteNews.com) - In a question and answer article published in the UK's Independent today, controversial Princeton University Professor Peter Singer repeats his notorious stand on the killing of disabled newborns. Asked, "Would you kill a disabled baby?", Singer responded, "Yes, if that was in the best interests of the baby and of the family as a whole."People who oppose Singer's position have maintained that Singer is the logical extension of the culture of death and that society will eventually embrace his stance if there is no shift to the culture of life.