Most Muslims are free to open the Qur'aan and read its pages, as probably most do. No, the barrier is a much more dangerous barrier than a physical barrier because many Muslims do not perceive that the barrier even exists. It is a barrier between the heart of the individual and the Qur'aan, between the person's actions and the teachings of the Qur'aan, between his aspirations and dreams in this life and what Allah is calling him to in both this life and Hereafter, between his way of life and culture and the straight path described in the Qur'aan. Again, this is a most dangerous barrier because the person may not perceive it. It could be argued that this book has covered the most important topic concerning the Muslim world today.
Many people lecture and write about what needs to be done.
In reality, there is a need for the Muslim nation as a whole to return to the Qur'aan. Any cursory glance at the Muslim world will quickly reveal that the governments and the masses as a whole are not applying the Qur'aan and, in fact, many of them actually have no idea what the guidance of the Qur'aan is all about. For many, the Qur'aan is simply a book to be read as an act of devotion or worship. Others see it as a book simply explaining the existance of a Creator and so on. What needs to be understood and studied in detail is what exactly are the barriers that have kept the Qur'aan from leading the present Muslim people.