http://www.al-islam.org/shiite-encyclopedia-ahlul-bayt-dilp-team/sunni-documentation-imam-al-mahdi
The above link is the SUNNI belief in the Mahdi, and that Jesus will follow him (heresy), and a violation of First Commandment. There is a different Jesus is Mahdi in some other Muslim groups, so that could be part of their civil war conflict on Islam..??
Note in the article that the black flag (ISIS) will be signs of Mahdi, and there is the 7 years-9 of Mahdi, which might correlate with our 7 years of Tribulation. The Shia does not believe exactly as the Sunni. ISIS is Sunni.
We have established here on FR that with O bowing to Saudi King who is over two holy sites of Islam, he must be Sunni sympathizer?? This is disturbing on many levels with what we see as withholding attacks on ISIS, and not being all in to protect everyone from ISIL. The L has significance to Levant??...includes Jordan and other nations in the Caliphate....and that is how Zero identifies the group. That’s significant.
Hope that link helps you see the divide, it did me.