I have heard people here justify it saying "you get what you ask for" referring to comments by NZF boss.
That's a bit pathetic imo. He asked for a hostile environment in NZ, which he didn't get, one single bit. The only thing that could be construed as hostile was not allowing the peruvians to bring in musical instruments, but this clearly isn't retaliation for that. We even had our annual legal fireworks period in the week before the game, so there were plenty around, yet no one did anything like this.
I think the precedent set by NZ's lack of hostility around the first leg totally overrules this justification.
Anyways, who cares, this will just make it sweeter if we win. And if we lose, meh, 10th beats 122nd, slow clap for that then.