Additionally. It would be very hard for a homo sapiens male to rape a neanderthal female, they are very thickset. Neanderthal males would have no problem in raping Homo sapien females though. And I would assume that the genetic variation between neanderthal groups would probably be much more pronounced than humans. The fact we have so little DNA from them means that analyzing their genes within modern human populations is very hard to do. How can we make assumptions based on vastly insufficient data?