Timestamp 14:20 is -- and I dare say it -- predictive of what is happening and what is happening will continue to make progress.
The operative word here is 'collision' when Harris pointed out that in order for Christianity to reform and rose out of the theological/political Dark Age, Christianity and extreme fundamentalist Christians had to collide with the forces of secularism and science. The problem here is that those forces were largely internal to Christianity. It was in effect a civil war of sort. Harris did not point that out and perhaps it was unnecessary to point that out. The collision between the Islamic world and the secular one is already underway and will continue for many years, perhaps even decades.
First, the extreme fundamentalist Islamists must conquer their own internal civil war before they can turn their complete attention to the secularists outside. If historical political civil wars are instructive, effective control of any territory must breach the %50 threshold in physical then the psychological effects will begin to take place. The other side is expected to be demoralized because they now control less than %50 of the territory and usually -- the population. This is why major population centers such as cities are more important than pockets such as villages and small townships. This understanding is more instinctual than from any book of tactics and strategies. Then once the Islamists have effective control of governmental institutions, the most important ones being the armed forces of the many Muslim dominated countries, they can turn their attention to the outside.
The problem for the Islamists is that they cannot predict the behaviors of the external secularists -- the Western countries. Internally, the Islamists can and will intimidate into silence any theological/political opposition. There will be bloodbaths, there should be no doubts about it. But the external secularists have enjoyed their freedoms from religions for so long enough that they are no less fanatical in defense of their beliefs than the Islamists for their beliefs. Essentially, the world will see two camps of fanatics in conflict, just like the Cold War between the democrats and the Marxists.
This conflict will not be about religions because as far as the ordinary peoples in the Western countries are concerned, the bloodbaths in the ME right now pretty much convinced them that Islam is not a religion of peace. The Muslims living among the Western peoples can protest high and low all they want about 'racism' and 'bigotry', and they can gather all the naive university students they can find to their side, it will be for naught. In the ideological and psychological territories, the secularists have control of %100 of their peoples.
Tactically speaking, the 'lone wolf' attacks by Islamists against the Western peoples inside their own borders are counterproductive and
WILL accelerate the executions of those unknown responses by the Western leaders. But this is a problem with religious fanatics. Enough of them are motivated by a sense of selfishness of what they are entitled to in whatever afterlife that they completely ignore the tactical and strategic consequences of their actions in this life. This is why we did not see Marxist suicide bombers. These 'lone wolf' attacks in the Western countries will happen and will increase over time.