You are 100% correct. But the ramifications of that are fraught with disturbing possibilities.
One disturbing thing is not only what might have to be done to large Muslim populations, but what might have to be done to their enablers: the many millions of liberals who by shirking their responsibility to maintain standards of modern civilization allow Muslims to take over previously civilized countries.
In short, liberals are as dangerous in the overall scheme to western civilization as the Muslim hordes who want to drag the world back to the seventh century. What should remaining civilized western countries do when within fifty years a previously civilized country like France, Germany, or Sweden is taken over by Islamic scum who start threatening remaining civilized countries with war or terror much like what Iran is doing now?
Now, it is true there are millions of the world's Muslims who are not dangerous fanatics. But they seem entirely unwilling to do much about the murderous fanatics in their midst. Until the great majority of Muslims start changing the tenets of Islam and seek to eradicate the hateful parts of Islamic theology, the world will always live in fear of the subhuman scum who are now terrorizing the civilized world. It's one thing if they kill in their own countries, it's quite another thing when they attempt to destroy civilized countries. But I'm not holding my breath waiting for "moderate" Muslims to change their religion for the better.
So if we do something drastic to Islamic countries that can't control the evergrowing numbers of deranged killers created by Islam, what can we do to the liberals who think there's nothing wrong?
More and more Islamic-sponsored terror may eventually lead to actions neither Muslims nor their lib enablers will much like. Nobody wants to see increases in authoritarian governments, but no civilized country should have to put up with kill-crazy terrorists.
Unfortunately, the only thing which has kept Muslim populations from overrunning others, each other, or squabbling within is force. Unbridled, unapologetic, often brutal force.
The little educated will refer to Vlad Tepes with horror for the wholesale impalement of invading Ottomans, but that action did much to save Europe and certainly Hungary from invasion and total cultural destruction. Not only was there the horror of meeting such a death, but also the concept that an afterlife in Paradise would be denied to those whose remains were thus violated. That is a deterrent.
More recently, it is ironic that the character of Colonel Kurtz was presented in fiction in
Apocalypse Now as a deranged madman, when he actually had the ugliness of the situation well understood, and knew what needed to be done: induce more horror and be more terrible than any alternative.
Liberals doubtless saw that character as the deranged product of the military mind gone amok, in keeping with their prejudices. By our standards here at home it was just that, but in the context of the film, it made sense.
Until they can wrap their pointy heads around the alternatives and what might indeed be necessary to retain the civilization Liberals so freely claim to be the standard bearers of, there will be neither peace nor detente with Islam, and if they should fail in that undertaking, they will fall rapidly under the sword, or rusty kitchen knife, or whatever is available to our enemies.