How is it that we ever could "keep" the fruits of freedom to ourselves? Freedom is a God-given gift, standing right there for any nation who wants it to take. Nobody "gave" America our freedom, we took it. America, for all the strength we have, cannot control the world or police all of its bad governments. If we follow that path it will stretch us so thin and cost us so much that we'll self destruct. Consider that it has cost us 1/2 trillion dollars just to kill a few thousand islamofacists. This is exactly how the Soviet Union imploded.
That said, it's necessary to defend any nation that is our ally, or that has some strategic value to us. But I'm not sure anymore that trying to 'democratize' the more barbaric islamofacist nations is a wise venture. Islam has shown itself throughout the ages to be a 'religion' that cannot be converted.
I'm confident that many have learned the lessons of Afghanistan
One reason the Taliban took over was after the soviets withdrew, so did we.
"Just let them kill each other" is a common cry.
What some people don't seem to understand is the world is a very small place and getting smaller every day. And groups like Al-Qaida thrive in the dark disconnected place of the world. that would be ok except they don't stay there.