The issue is one of child care, not of sexual orientation. There are gay people, whom I would quite happily leave my children with. There are straight people with whom I would not.
I do not completely go along with the thinking, "Gay people have a right to have children too." I think that is an emotive statement, which clouds the real issue of putting the childrens' needs first. Nobody has a "right" to have children. I certainly do not. I have just been lucky. However, there are cases when placing children in the hands of gay people is the best option. The issue addressed in the initial post here is one of child abuse. Sexual orientation should be left out of it.
I forget the exact words that lawyers use to express the idea, but it is along the lines of, "Exceptional cases make bad law".
Writing the headline, "Gay parents molest children", is as crass as writing, "Black gunman shoots bank clerk". In both cases, the use of the first word as a near perjorative is biased and unnecessary.