Your whole post is fiction. Among thoise with a developed adult sexuality(ie people who are attracted at all to adults), gays make up about 5ish percent of pedophiles, or about the exact same ratio as they make up of the total population. The far and away vast majority of pedophiles who can be labeled straight or gay are in fact straight. What you are thinking of us a couple "studies" done that call any pedophile attack on those of the same gender gay. That is false.
The birth defedt thing is painfully stupid as there is zero evidence to support such a claim.