What is the difference between Sunni and Shiite fundamentalists?

What is the difference between Sunni and Shiite fundamentalists?
Both are seeking to target the security of various countries. Sunni fundamentalists aim at establishing an Islamic caliphate and recognizing no borders between countries. On the other hand, Shiite fundamentalists are looking to export their so-called revolution abroad. It is interesting to know that their methods are the same and violence is the main tool of both of these groups, in a way that even places of worship have not been immune to their carnage.

ISIS Made by Iranian regime & Maliki, with US cooperation

The Syrian regime has a strategic role for Iran, and the fall of Bashar Assad in Syria will be a severe blow to the Iranian regime because it would lose its strategic ally and the link to the Lebanese Hezbollah. Therefore, the Iranian regime has used all its capacity to maintain Assad in power.