I don't think it even does that though. if the ability to absorb a system of ethics is an inherited trait, then atheists have presumably inherited the ability

I don't think it even does that though. if the ability to absorb a system of ethics is an inherited trait, then atheists have presumably inherited the ability as well and would therefore be (from a statistical perspective) as ethical as everyone else. the basis of his claim (snyde corner of the mouth slander, really) undermines the claim itself. the whole thing cancels out rather nicely.