Another good post and a subject I know something about, both from studying psych and knowing psychos. hehe.

But it isn't thoughts they are lacking, it's emotions. They don't experience emotions normally. Jung always said that the opposite of love isn't hate, it's power. You either want what's best for those you "love", or you want what's best for yourself (i.e. your loved ones to do what you want them to do.)
I point this out because psychopaths are all about control. They may be totally obsessed with you, but it's not about love. It's about control. They really don't feel an emotion like love the same way non-psychopaths feel it.

As you point out, they usually are very manipulative and can have an uncanny ability to know exactly what people think. But it can't really be called empathetic when the only reason they care is that they want to control you.

Very interesting topic. The subject is made relevant if not massively imperative because it applies to 'the controlling class' that's running this world. It points to why they do what they do and why they are so successful.

Love your work<3