The impact of the secularization of Sciences

We know that western civilization is very advanced. This is based on the development of science. Basically, Islam has made science as the study observations. and this work, evidence of its success can be found by some scientists such as al-Battani with astronomical science,Ibn Sina with medical. al-Thusi with triangles,. and many other Muslim thinkers.But it all vanished, based on history that the Islamic decline was marked by the collapse of the Abbasiyyah Empire. But it all vanished, based on history that the Islamic decline was marked by the collapse of the Abbasid Empire in 1258 AD. Although there is still a bit destroyed the Abbasid scientists who are still doing observation, but it is a bit like Ibn Abd al-Barr hadith scholars, Ibn Rushd with his philosophy, and Ibn Bajjah.
The events of the crusade, not only lead to the destruction of an Islamic state, but there has been knowledge transfer in the Islamic world into the western world. As an example of taking the books in the library of Islam, then taking pieces of carved mosques, so that advanced western civilization.
Western civilization was advanced and makes construction and new methodologies in researching a science. The most fundamental aspect of the methodology is missing things that are not visible, mislnya spirit, soul, and god. So the observations made was that the physical nature only. The study of the things that are ignored by their non-physical nature. The most prominent is the science of physics as the most dominant. while the psychology of losing the object is the soul.
Next step was to eliminate the impact of God in man so that the natural end for they do not exist, sin is not returned, and finally the man to forget God and act arbitrarily against themselves. Rules in the Bible are ignored because they are the material while the non-physical nature of sin. It is ironic is not it? man is a creation of god who must practice the teachings. but we can see that this world has been dominated by secularism. This is the most real, whether we realize it or not?