So I looked up Via Chicago by Wilco on Song Meanings (because that literally has become my home site) and found two comments withholding good points…

Comment from augurus:
“Our hero loves his significant other so much that even after their seperation, he cares so much that he could and would live through the death of this significant other. He doesn’t even mind the significant other’s blood raining over him. He doesn’t mind watching his lover die: that says a lot about the amount of love he had for this significant other. And the other euphemisms spliced onto dark pop just makes this more interesting, and perhaps the centerpiece of Summer Teeth. “And a cracked door moon says I haven’t gone too far” just goes on to explain that he won’t be satisfied after burying him/her (most likely her) in a fireworks display. In fact, he’s even apathetic to the falsely accussed.”

and then an opposing comment:

Comment from thisheargiraffe:
“I think the person above me has got it all wrong. He isn’t saying that he’d be fine with his significant other literally dieing. The song is about him moving away from his significant other, and he misses her. The song is about him trying to forget her. When he says he killed her, it means he’s trying to kill his feelings for her. All he wants from the relationship is a notebook full of white dry pages, just memories. He wants to leave his feelings behind. But in the night, his mind wanders back to her. “

I’m sorry, it’s just…

how did this HAPPEN? We were in the car, driving you home. You’re my best friend, i’m practically in love with you. YOU’RE moving to CHICAGO. I am wearing a WILCO shirt at that time for shit sakes! and THIS SONG comes on the radio! Switch the roles and we’ve got ourselves someone who likes to write songs for us.