If there is a religion dominant, it will be Islam. In western (i.e christian ) nations, Atheism / Agnosticism is the fastest growing religious view, even in the USA. The more wealthy states in Europe ( UK, France, Germany, Sweden, Belgium, Netherlands ) and a few others already have 20-30% Atheists / Agnostics. A study in the UK suggests that as much as 2/3 of teenagers don't believe in a God.
In Middle Eastern countries, this is not set to change. A lot of the middle east is still under Sharia Law and due to the extremist views of lots of people in power this won't change. Add to this the insurgent strikes and terrorist groups violently upholding their beliefs ( attacking schools, killing the more liberal politicians ) it leads to a whole lot of people staying set in their ways.
In Middle Eastern countries, this is not set to change. A lot of the middle east is still under Sharia Law and due to the extremist views of lots of people in power this won't change. Add to this the insurgent strikes and terrorist groups violently upholding their beliefs ( attacking schools, killing the more liberal politicians ) it leads to a whole lot of people staying set in their ways.