Chris Kyle, April 2012. (Paul Moseley/Fort Worth Star-Telegram /MCT /Landov)In reaction to Saturday's shooting death of 'American Sniper' Chris Kyle, Ron Paul stirred criticism amongst his peers this afternoon, tweeting:

Chris Kyle's death seems to confirm that "he who lives by the sword dies by the sword." Treating PTSD at a firing range doesn't make sense

— Ron Paul (@RonPaul) February 4, 2013

Kyle, an ex-Navy SEAL and 'remorseless' sniper was shot and killed at a Central Texas gun range on Saturday alongside a friend.

Kyle, 38, who wrote the bestseller 'American Sniper' about his 150-plus kills in Iraq and his friend Chad Littlefield, 35, were found dead Saturday about 50 miles southwest of Fort Worth, Texas.

The two reportedly were shot by 25-year-old Iraqi war veteran and Marine Eddie Ray Routh, who is now in custody and is the only suspect in the shootings. Kyle and Littlefield had taken Routh to the shooting range to help him with his Post Traumatic Stress Syndrome (PTSD).

Kyle had been deployed to Iraq multiple times, where he set the US record for sniper kills.

According to the Associated Press, Kyle told Fox News' Bill O'Reilly in January 2012 that he viewed his Iraqi victims as savages and didn't think of them as human beings. "They live by putting fear into other people's hearts and civilized people just don't act that way," he said—adding that he has no regrets about the 150+ lives he had taken.

Asked by O'Reilly if he himself had any PTSD issues, Kyle said, "None of my problems come from the people I've killed."

When Kyle's military career ended he started Craft International, a security company with the motto "Despite what your momma told you, Violence does solve problems."

He was an outspoken opponent of gun control.

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