I may not understand what you're feeling because I didn't try it on my own skin, but I can tell you that the way you and your sibling have being treated i disgusting, horrible.
I can't even begin to imagine what you must have felt when people that where supposed to take care of you talked like that anìbout your parents, your family.
to have to hear people talk about your parent like second class human being it's...there are just no words...
Bad decision, i belive, aren't taken on impulse. the society, the environment is as much -if not more- responsible as the single individual.
Don't ever let anybody saying anything else pull you down.
they're just amoral hypocrites!