Well, each case is different, of course, but dykes have no corner on the step-child killing market:
Man buries stepson alive, jealous of various thingies:
http://www.tribuneindia.com/2005/20050630/delhi.htm
God knows why this stepdad killed his kid:
http://www.recordonline.com/archive/2006/02/24/news-hyshooting-02-24.html
Stepfather suspect in toddler's murder:
http://www.thejakartapost.com/detailweekly.asp?fileid=20060227.@02
My point is this:
We have very legitimate reasons for arguing against the immoral environment that adoptees will face when adopted by gays. But when people get all knee-jerk and react to stories such is this lesbian murderer, our side starts to look kinda stupid.
This woman sounds like she was a serious mental case. If you think that her being a dyke played a major part in her committing murder, then pull up some more dyke-murderer stories.
Does being a step-dad make someone likely to commit murder? I don't think so, but run a google news search on "stepdad murder stepson" and you'll find a bunch like I did.
Let's try to be smart conservatives, not idiotic reactionaries who marginalize themselves like some Talibanistic renegade cult.
Of course murder is an extreme in any sense. The motives behind it, however, can sometimes indicate a tendency that manifests itself less conspicuously. For ordinary stepchildren, there's the resentment at caring for the child while knowing that the child will never truly be one's own. This would particularly affect stepfathers, who feel social pressure to be breadwinners.
Of course, it'll usually manifest itself in harsher punishments or unkind words and shouting. It's only those who already have imbalances who will commit crimes.
But the twist here is that there wasn't even a pretext of misbehavior on the part of the child. It wasn't so much that the partner wanted the child to behave or conform in a certain way, it was that she wanted validation for the way she viewed herself.
She wanted the child to explicitly and consciously affirm her identity. It wasn't as if she'd lost control of one aspect of her life, she didn't have any control of her own identity and she wanted the child to give it to her. I think that's a general problem and, in the main, it manifests itself in much less extreme ways, but it is there.