Noami,
As I said earlier, we have meddled in the area for a hundred years. The carving up of the Ottoman Empire, and how badly that was done, is the cause of many of todays conflicts.
The rise of fundermental Islam and volunteer jhadist fighters probably began about 1980. The Islamic Revelotion in Iran was a great fillip to them. It demonstrated the imperialist West could be defeated and Islamic states could replace them. The next battle ground was Afghanistan which had been invaded by imperialist Russia. A volunteer army recruiting from all over the region and financed by the US through Saudi succeeded in driving Russia out and resulted in an Islamic state run by the Taleban.
When America set up permanent bases in Saudi after the Gulf War (that one was about oil and money), the remnants of the fighters who beat the Russians set their sights on the US. Al Qaeda's initial aim was just to rid Saudi of the imperialist US presence there. It did that by attacking US targets outside Saudi, in Africa.
The Arab spring conflicts are seen opportunities to depose western puppets and replace them with Islamic states. However, there is resistance to that in several of the countries involved who do not want to replace one form of tyranny with another, hence the fightback in Egypt.