Vito,
I'll bash his parents for engaging in an ongoing cover-up of his activities, THEN reporting it to the police AFTER the Statute of Limitations had run. They basically chose to keep their pervy son from having to answer to the authorities for his action, all the while forcing his victims to live under the same roof, occupy the same space and face their sexual offender every day!
Now, those girls are basically defending him and I have very little doubt that is because their parents brainwashed them (something akin to "Stockholm Syndrome) into forgiving him and probably taking the blame onto themselves. Imagine someone 8 -12 yrs older is molesting you and your parents take steps to protect him from any legal trouble while telling you to stay hushed-up about what happened.
Do you think that after you grew up and moved away from that crazy situation at some point you wouldn't have a moment of clarity and realize that your parents were ready to sacrifice your innocence and childhood to protect your molesting sibling. Because that's exactly what they did, by putting their one son above at least 3 of their daughters and for that, I'll direct a great deal of scorn on those a-holes because they desperately deserve it!
The other siblings, I will not bash - they probably had NO recourse except to go along with what their parents taught them or ordered them to do. If anyone needs counseling, it's probably them and if anyone deserves sympathy it's the victims, not the pervy son and his enabling parents.