Queer theorists like Butler see gender performance as an expression of identity, and therefore want to deconstruct traditional gender categories not to get rid of gender as a concept but to give people greater freedom in how they perform it.
I'm not an academic and even I can see how that can lead to sex offenders being free to 'perform' their identity in really dangerous ways. That doesn't even have to have anything to do with the trans debate, if a moderator is reading that.
'There is no matter outside of discourse' ...or in other words, the way we describe and classify things produces them and gives them ontological significance'
If everything is constructed, paedophila arguably isn't a problem. Isn't that wonderful, this huge societal problem solved in an instance. There is no tangible harm done, it's just something that's been constructed as harm. If you were raped as a child or teenager, no bother, learn to classify it in a different way. Don't impinge on the freedom of those whose sexual equality and freedom counts no them being able to attack children. You are a fascist supporting oppressors in the church if you say otherwise. Right?