Except it is not an unproven theory, it is a very proven theory. The province I live in and my mother was living in as a child (a mere 70 years ago) was a very catholic area of the Netherlands. It was an area that was socially regressed, academically challenged and oppressive. When family members of my grandmother were house swapping they had to be told to not allow their children to walk around in pants, they were warned to at all times have a skirt over the pants or they would be fined. It was an area where processions still were the norm. If the procession came through your street you'd better kneel for the statue of Christ, my mother was forcibly pushed to the ground if she did not kneel/bow down to the procession. As an atheist she could not get many jobs because being catholic was still a mandatory thing.
It only matured in Area's where Christianity ruled was when the genie was no longer possible to be put back into the bottle and even then churches made investigations difficult and many people did not believe them for one second because their priest/church leader told them it was heresy and lies. Only when actual schooling because the norm for children, at that moment did the academic knowledge come into the public domain and did academia start to advance faster and faster.
Inventions made that academic field advanced faster and faster because it was not only education but also the great inventions of radio and television bring science and knowledge into the houses of people, they no longer had to depend on their priest to inform them about society and academic advancements.
Hence in areas where Christianity is highly believed in as in the middle of the 19th/end of the 19th century and they live without education/television etc. etc. it is still the area where there are no great academic advances because no child goes to a higher education except maybe farming school, children still drop out when they are old enough to work the fields or go to work in general because they do not believe in education/academia/modern inventions. In those areas they will still refuse to even use medical advancements as vaccines because that is not in accordance with what their church tells them.
So even we have areas where all those things you accuse Muslims of when it comes to social and academic advances is falling far behind. And as stated before the enlightenment movement started here centuries ago, in Muslim countries it has not been 20 years since that started, the same goes for other societies removed from modern life in Africa, Asia and South America. We cannot just expect backward countries/societies to move to our level of advancement in social and other fields in the matter of a few years (for a process that took us centuries).
I do not apologize for anything, I just also do not have irrational hatred and do not blame all Muslims for the crimes of a minority.
The PEW study showed that there are only a few countries where this view is very prevalent with more than 10%. In most Muslim countries it is far below 10%. There are countries where it is seen as acceptable but those are not stable countries, countries like Palestinian authority, Egypt, Pakistan, Afghanistan, Bangladesh, Kosovo, Turkey, Kyrgyzstan, Tunisia, Jordan and those are countries in which the reasons for suicide bombings are also nationally based on top of religiously based. Some of those countries are unstable, countries that are in what they see as a struggle for survival or where it is internal Islamic groups that use those terrorist weapons against each other.
However if 90% of Muslims on average state it is never allowed to use immoral weapons to "defend" their religion you can hardly claim it is the norm for people to feel this way.
And there have been Muslims living in Europe for decades and only when terrorist organizations started sending people like that to Europe did this problem start. But those are mostly lone wolves or small groups.
Do you not think there are Westerners who have extreme views for the defense of their faith/culture/nationality/country/religious group? Maybe that number is much higher in Muslim countries but as stated before, these countries are living mostly in the dark ages compared to "us".