"Libertarianism" is inherently atheistic, materialistic, and isolationist. This is not a new development, but rather is the foundation upon which "libertarianism" is built. "Libertarians" (just as Marxists) will always try to convince us to ignore all aspects of human nature other than material acquisitiveness. God tells us otherwise. I'm going to side with God on this one.
Cato was a great organization at one time(imho). They were one of the first policy groups in Washington that was not run by leftist elitists and they sided with the Reagan Administration on most of his policy issues.
Since 911,they have changed dramatically for the worse.
On possible reason Cato tends to focus on economic liberty, I suppose...