Decomposin' Arizona

Here's what I don't understand: illegal immigration is down in part because of the economy; and enforcement seems to be much tougher if these stories about the corpses of migrants found in more remote areas are true (and dead bodies are a pretty solid statistic). So why the uptick in anti-illegal hysteria now?

This article available online at:

http://www.theatlantic.com/daily-dish/archive/2010/07/decomposin-arizona/184213/