I personaly believe the real difference between the western world which follows a christian tradition and NOT(!) christian religion and between the Islamic world, is solely the fact that most Islamic nations are not democracies with free spech and that they are regions struck with a lot of povertiy. If we had a real christian ruler with the bible as legislative power, we would see in the US or Germany the exact same shit as you do in Quatar or Saudi Arabia, who in turn do pretty much the same shit as ISIS, just a bit less belligerent.
If most of the Islamic states would be democratic and with a certain amount of wealth, we would see far less of this religious fanatism.
Your idea of the religious is seemingly low. They are the same amount of human that you are; capable of the same feats you are. Mind you the many great Western works were kept alive, in Latin, by the Church. The West would have lost many to Muslim invaders of the past without; or Persian before them.
Taint as in any anti-influences to the area. Corruption would also be a corresponding word.
Yes, that's what religion is really really good at. Preservation.
But when it comes to actuall progress? Not so much. Because progress, means critising, questioning, discussing everything. And this is only possible in a society with free spech. Something that modern democracies have as their basic principle. Religion can work perfectly fine without any kind of free spech and critical thinking, infact it even works better without it. There was no knowledge gained by monks who did nothing else but copying books for several 100 years, of which many had to be actually translated from arabic to latin by jews in spain during the muslim occupation - how ironic. In which way, has religion improved any real scientific knowledge? It didn't. When ever some real progress was made, religion was always ignored. I am not trying to shit all over religion, it was a great way to lead societies in the past, to give people a concept of how to interact and live together. But it is not this beacon of knowledge or even research as some describe it. Neither this 'era of englightment' in Islam, nor this christian monks that couldn't even read most of the books they keept around.
The real progress that was achieved, was the fact that universities started to emerge at some point, and yes, this 'idea' to have a place which is solely about studying and learning, was in some sense inspired by monks in their monasteries.