Whats better than child porn Watching a dog fuck a dead baby while masturbating in front of the babies parents
I think that joke really crosses the line, even if it is just trolling.
It's just a sick joke. If you don't agree then don't watch.
It's not okay to tell jokes about others being harmed. Humor that makes fun of violence toward people or animals isn't funny. You should practice more empathy with people and animals  or your jokes will hurt someone.