I've got no problems at all with any of that. The dukkha that arises from unwholesome volitions is very real!
The point of differentiating between a Buddhist conception of "phenomena of existence" as internal, by contrast comparison to a more worldly take on the subject, is to demonstrate the absurdity of the comment quoted in the opening post...
Even the child brutalized by drugged adults deserves the horror. The mentally ill, the retarded, the homosexuals, and the millions of Jews killed by the Nazis deserved it for evil they must have done in the past. The slave beaten to within a breath of death deserved it, if not for what he did today, then for what he did in some previous lifetime. Likewise for the rape victim. She is just getting what she deserves.
The killers and rapists mentioned were acting on their own unwholesome volition and were not compelled to act as they did by the kamma or vipaka of their victims. Other sentient beings (and thus the operation of their kamma and vipaka) are internal only to themselves.