Wuthering Heights: Til death do us part?

There are some serious issues going on in the minds of some main characters. Heathcliff is set on punishing Hindley for bullying him when they were younger. However, Hindley dies before Heathcliff can execute any brilliant scheme of revenge. SO WHY does Heathcliff take out his resentment on Hareton? It's not like Hindley's going to be really angry about it; he's already dead! Also, Heathcliff demands he be buried by Catherine with their coffins open to each other. THAT'S SO WEIRD!!!! I can't be the only person that thinks that is extremely disturbing. What on earth was going on in Heathcliff's mind that would make him think being buried with open coffins would make his life (that he no longer would have) better?
There seems to be a serious difference of thinking between Miss Bronte and the rest of humanity in regards to death. What with Catherine haunting Heathcliff 24/7 and stuff like that, I'm pretty glad to not be a character.