What's the probelm to send troops to the border

Apparently lots of the troops are still stuck in Iraq. Even worse, they have record to kill people live along the border.

The last time the U.S. military posted troops on the border near this tiny cluster of farms and ranches, an 18-year-old goat herder was shot to death.

Hardly a day passes that Esequiel Hernandez Jr.'s family and neighbors don't think of May 20, 1997, the day a Marine corporal shot and killed him.

"There was no motive for them to (shoot) Esequiel and I worry that the same thing could happen, or worse," his grandfather, 79-year-old Valerio Pando, said in Spanish.

I didn't really study the case but this fact is really disturbing to me. People are worried about the evolving of this immigration debate, saying it's fostering the white supremacy and racial discrimination. I hope it's not.