The banality of evil.
I don’t think he’s entitled to credit for having a “dangerous mind.” He’s just recycling old, pagan practices and repackaging them for people whose itchy ears want to hear someone justify them doing what’s convenient.
The itchy ears are the problem. In today’s world, someone is going to tell people to go ahead and do what is convenient. And lacking any moral compass, lots of them will listen as if what he has to say is edgy and profound.
In a different moral climate, Singer would be shunned as the monster he is.