Lets look at the "extremist takeover" thing in perspective.
All of the eight nuclear weapon states on the planet use their arsenal as a deterant - to prevent another neighboring nuclear state to hold them hostage on key issues, and essentially ensure MAD - mutually assured distruction, if another nuke weapon state decides to use it's weapons on them.
The single quantifiably extremist nuke state was the one which used their nuke weapons *not* in self-defence, but against a weaker country that had no nuclear arsenal. And to maximize the terror and fear inflicted, they bombed highly concentrated population centres rather than military installations. Yes, I'm talking about the US. The only country to have actually gone so far as to have actually used their nuclear weapons on other human beings, not even as a last resort to defend themselves, but just out of arrogance and hubris. They damn near used nukes in Vietnam when facing failure, and after Israel bombed the USS Liberty using unmarked aircraft killing dozens of American sailors - hoping to peg it on the Egyptians, high-ups in the US decision-making process were in on it, ordered aircraft loaded with nuclear weapons to go bomb Cairo before even a preliminary investigation had been conducted. Unfortunately for them, the zionists could not sink the USS Liberty, and it radioed in and informed them that the Israelis had been the ones bombing, and the aircraft were recalled.
And then they go around lecturing everyone else on how they should adhere to what the US considers moral and correct. They're opportunists of the worst sort, willing to bend any half-truth to serve their agenda. And our westernized liberal class which, sadly due to an accute lack of original thought and critical thinking ability, imitates popular opinions in the US regardless of what's being said and how ridiculous it looks in the bigger picture.
If "radicalization" is a threat to the world, it is so because the west, and the US specifically - just like it's previous western superpower predecessor Great Britain(and the Spanish, dutch, french with their own colonies before them) - just brutally rolls over and crushes the hopes, dreams, and aspirations of billions of people. When you kill, loot, maim dozens of countries, people from those places are bound to react.
Here's a facinating article by renown geo-political scholar Webster Tarpley. His analysis and insight is much-sought-after and he's a regular guest on media as diverse as Russia Today, to the BBC, and alot of alternate news sources in the US. His thesis has been that given the extremes the US is going to, to meddle with and undermine Pakistan in numerous ways, the thing preventing the US from just inventing an excuse to all-out invade Pakistan is Pakistan's nuclear arsenal. They've never been shy about invading countries with made-up excuses before - the "weapons of mass destruction" in Iraq, Osama fooling the entire US air-defence system for hours and bombing the World Trade Centre from a cave in Afghanistan, or the staged Gulf of Tonkin incident they used as an excuse to attack Vietnam.
Obama Declares War on Pakistan « TARPLEY.net