Season 3, episode 2 discussion here.

How did Kevin square emerging from the dirt and living? He chalked that up to hallucination? So him and Nora, after everything they both have been through, are denying every illogical event or happening?

I only asked about Nora's husband because he Departed with Nora's children, yet throughout the episode she's only asked if she wanted to see her kids again. The only reason I asked was to see if there was any reason if she didn't want to see her husband again, other than she's in love with Kevin. Now that I remember that the husband was cheating on her with a pre-school teacher, I now understand a bit more why she wouldn't want to see her husband anymore.

Nora's at her breaking point, I think. She lost her husband and kids, and spent three years paying prostitutes to come to her house and shoot her while she wears a bullet proof vest as a coping mechanism. She then met Kevin, began dating him, and then found baby Lilly on his doorstep. Lilly became her new coping mechanism, with Kevin and Jill being icing on the cake. She then spent the next year, being a family with Lilly, Kevin and Jill until they moved to Miracle. After the events of Season 2, Lilly's mother came back seeking custody, and Nora then spent another three years not only trying to get over the loss of her children, but Lilly as well. Jill's moved out and gone away to college, and all Nora has left now is Kevin, but he's not enough. She's regressed to being the old Nora Durst we knew from Season 1, meaning she's very emotional unstable and self destructive again. She's spent seven years trying to cope with her losses, and nothing has worked. Kevin suggests having a kid with her, but Nora does and/but she doesn't want a kid with him for conflicting reasons. She does want to have a kid with him because she loves him, but she can't because she'll feel bad about the children she's lost already. Or perhaps she feels like the child she'll have with Kevin will disappear too because of her being deemed "Nora Cursed".

Then, out of the blue, after seven years of trying to cope with her losses, a celebrity from the 1980s that most people do not remember (at least, that's how I see Mark Linn-Baker anyways) calls her up and tells her she has the chance to see her kids again. From what we've seen from Nora Durst in the past previous seasons, she has debunked everyone who crossed her path, trying to tell her that there's a reason why her family was taken, or how they were taken. Now, after seven years, and been putting up a good fight, trying to make due in what is left of the world, she's tired and worn out. She hears a possible BS story about how to disappear like the Departed, that most certainly will result in death, but she doesn't care anymore. She's got nothing to lose. She wants to end her pain, regardless if she dies or not. She spent seven years trying not to succumb to the insanity the world has delved into. Now, she's giving in to it. The only shitty thing about this is that she's taking Kevin along with her, and he doesn't know what she intends on doing. Someone above mentioned Nora getting vaporized, and Kevin sacrificing himself to save her. It's probably going to be more than that. It's going to be him showing her that he truly is the Messiah her brother Matt, John and Michael claim he is to be. He'll probably die saving her, and she'll end up living in Australia, under the name Sarah. Why? As shown in this episode, self destructive Nora does not care about letting a legacy be a legacy (the man on the tower). She had to debunk that to make herself feel good, and not allow others to be easily and foolishly led. By the end of the season, after Kevin saves her and brings her back from the "Other Side", she's going to allow Kevin's legacy to continue, and in Kevin's legacy, both her and Kevin departed on the seventh anniversary of the Departure. Nora will live the rest of her life knowing exactly what happened to Kevin, while the rest of the world is foolishly led to believe Kevin sacrificed himself for humanity (that is, if Matt's book gets published), when really Kevin sacrificed himself for Nora. And Kevin's sacrifice will not only be remembered by Nora in turning her life around (hopefully in a positive way), but will be remembered for generations to come if Matt's book gets published, and Kevin is celebrated as a religious figure.

At least, that's what I think will happen anyway.

They were trying to find the 'right' Kevin, but ended up killing the dude.

They drowned the Australian police chief because they thought he was Kevin Garvey. It's like religious fanatics drowning,hanging, and burning witches. They're guided by their faith to do horrible things, but it's all in the pursuit of executing God's plan.