SPOILER Thank's a lot, Kirsty
This whole mess just because you wanted to go back to hell to save your father. By the way, you completed failed at that. Also, maybe your father was in hell for a reason (note* if someone goes to hell, forget about them). It was revealed by his attempt to have sex with you, that he did in fact deserve to be in hell. At that point you set his little spot of hell on fire. So not only did you not save him, you actually made living in hell even worse for him. Way to go daughter!
When you and Tiffany escaped hell, did you happen to notice the thousands upon thousands of screaming weird lights also escaping hell? I can only imagine that those were evil souls trapped in hell (where they should be). But thanks to you, now Earth has to deal with them.
You might argue that you never actually opened the gates to hell, and it was the doctor (to be even more technical, Tiffany hands instructed by the doctor's desire). That is true, but you didn't have to run into hell just because a door opened. Had you not gone in, the doctor would have simply become a Cenobite and hell would have had another guardian. I'm sure the door would have closed shortly after and nothing would have escaped. Also, the Earth would have been rid of one mean doctor.
Thanks to your stupidity, everything got *beep* up.