Because they're all heading back Mexico.
Never ones to shy away from controversy, last night's episode of South Park revolved around America's ongoing issue with border control. However, in the minds of Trey Parker and Matt Stone, the real problem isn't with keeping Mexicans out … it's keeping Mexicans in!
Check out the clip (above) from last night's episode, The Last Of The Meheecans.
Thoughts? Did this episode cross a border for U or was it still funny?