There will be no permanent solution.
There are vastly more of them than us for one thing, plus they are far more fertile than we are.
On top of that, extremists in Islam have been around since its inception.
We cannot kill them faster than they can put new people into insurgency.
The only way for us (and Europe should they come to their senses which they won’t) is to contain them as much as we can in their own lands.
I urge you all to read the history of these regions. It one long litany of ISIS like groups marauding over their fellow Muslims over arcane religious differences. One after the other with only brief periods of what could be called “peace” when a strong dictator could hold onto power for whatever period of time.
Sure we can, a city a day. Pretty soon we'll start running out of their cities.
When it comes to blowing things up....we're pretty good at it.
The reason there is a semblance of peace occasionally with a dictator because occasionally someone emerges that does not suffer the instigators.
Play nice, and ruthless ones will take advantage for power and wealth, similar to the dem party here.
Prosecution with extreme prejudice does and will work, has worked every time it has been tried, worldwide.
Hoping to simply contain them in fact gives them the green light to escape their containment and wreak havoc, with minimal consequences.
Severe consequences makes nice virtual walls.