It's not possible to do something about all the unstable and fanatical individuals in the world who have some weird idea in their heads that makes them dangerous towards other people.

In another sense, it's not possible to make life perfectly safe for everyone... ;-) (though we keep trying to in various ways)

But it IS possible to adopt a more sensible and moral foreign policy than one that involves:

1. engineering coups with our secret service people to replace a foreign elected government with a dictator of our own choosing...as was done in Iran in the 50s...or in Chile when the Pinochet government was brought in and Allende killed.

2. attacking Afghanistan over a criminal act (allegedly) committed by 19 men who were not even FROM Afghanistan.

3. attacking Iraq over non-existent WMDs!

4. supporting corrupt dictators in places like Saudia Arabia, Egypt and various other states, because they cooperate with our geopolitical ambitions.

5. Always one-sidely backing Israel in its conflicts with the Arab world no matter what Israel does to anyone.

6. Threatening Iran over an (alleged) nuclear weapons project while not saying "boo" to Israel for actually building a couple of 100 nuclear bombs which everyone knows are there, but which no one does anything about.

Etc.....

The reason young Muslims have been radicalized to fight the West is not because they belong to a religion. It's because of terrible geopolitical and social stresses that would have caused ANY population to react in a hostile manner towards the West. The fact that there are some religious fanatics AMONG the Muslims is an issue...yes...but it is not the primary issue.

The primary issue is the aggressive, neo-colonial foreign policy of the USA and the UK and Israel (and sometimes Russia too, although Russia's been very weakened since 1989) with regards to messing around in the affairs of a whole bunch of poor nations in the Middle East. Those neo-colonial foreign policies must be changed to treat the Muslim nations decently and fairly or the conflict will simply go on and on forever...because we cannot kill all the Muslims, and they are not all going to lie down, die, and stop defending themselves either.