"But why is it that only the women inherit this skeletal structure matrilineally, and not men?"
Some men probably did inherit it, but then consequently tended to reproduce less than the other men who did not inherit it. In order for a trait to become established, not only does it have to be inherited, but it has to be inherited by those who then reproduced more than (or at least not less than) average.
"Also, since the victims also did not commit suicide, would these victims be Gentile-Aryan hybrid types, since they were non-Aryan enough to find their rapists attractive, but nevertheless had Aryan skeletal structure?"
Find their rapists attractive is not the only explanation for not committing suicide. In some cases it could have been merely choosing to stay alive even if they did not like the lifestyle. Some perhaps hoped to be ransomed/swapped back home one day. Some could even have been spies.