When the socialist government in Afghanistan asked the Soviet Union to intervene to help repel the Islamic extremists, we all know the response from the US. Military support for the Islamists.
The elected government in Iran in 1953 was secular. The CIA overthrew that government for profit. The current theocracy there is a direct reaction to that.
It's pretty well understood among the most respected sources that ISIS was created by the US. Not that it was created intentionally, but it was a direct consequence of the US invasion of Iraq and the way the occupation was managed. ISIS was also provided with military armaments from the US. The theological roots of ISIS stem from elements in Saudi Arabia, which exist thanks to critical US military support of that regime, which enforces the ultra conservative Wahhabi form of Islam.
Hamas was funded by Israel. The PLO was regarded as too powerful, so Israel helped nurture the Islamic extremist elements in the Palestinian territories as a divide and conquer strategy. Hezbollah likewise is a result of Israeli action. It was formed by Muslim clerics in response to the invasion and occupation of Lebanon in an effort to repel them.
This is what is frustrating to me about complaints from conservatives about radical Islam. Every major radical Islamist presence has it's roots in policies supported by the very conservatives that decry radical Islam. If we really have a problem with Islamic extremism we should ask ourselves why we allow our government to foster, nurture, and support it.