This genetics theory is absolute crap. Apart from anything else, many of those killed already had kids when they died. The problem is a leftist culture which has poisoned the minds of several generations now, possibly as part of an old Soviet demoralisation program which infiltrated the educational, media and intellectual establishments and began to deride and destroy old values in a way designed to make it easier to subvert the population towards supporting (or at least not resisting) Marxist-Leninism.
There are several books and lectures available by Yuri Bezmenov, an ex-KGB agent, who explains in more detail what the Soviet agenda was and it is not really surprising that we are were we are at today:
http://www.youtube.com/watch?v=y3qkf3bajd4
bookmarking for later