Peter Singer lost alot of credibility even among his own supporters when it was revealed that he kept his terminally ill mother alive on artificial life support for many months. For all I know she may still be alive.
I was unaware of his mother's health condition. IMO, that would GIVE him a bit of honor.
However, he has recently published an article stating he sees nothing wrong with humans having sex with animals. Seems to me the drug culture has produced some mighty weird academics......