I found something in an old thread, in JAL's own word:
JAL: In my opinion, this is because as soon as someone is engaged in a love story, when there’s love at play in one way or another, then you really, really want these two lovers to get each other and at any cost. You know it’s like, Eli – clear all obstacles, kill them all... Oscar – get the knife, do something... As long as the two lovers get each other, but there needs to be distance and obstacles between them so that you can like them.

