Next step: A sequel of the siege of the Grand Mosque in Mecca by Juhayman al-Otaybi:
Yaroslav Trofimov, a reporter with The Wall Street Journal, talks about the 1979 siege of the Grand Mosque at Mecca in Saudi Arabia. It is the holiest site in Islam, and gunmen held it for two weeks. It was one of the events that gave rise to al-Qaida, and Yaroslav wrote about it in his book The Siege of Mecca.
http://www.npr.org/templates/story/story.php?storyId=112051155
https://en.wikipedia.org/wiki/Grand_Mosque_seizure
Al-Qaeda Militant threatens Saudi TV Host and says that the Prophets Grave in Saudi must be destroyed. He demands Jihadists give up their Jihad in Afghanistan, Yemen, and Iraq and instead focus their efforts against Saudi Arabia. The Saudi TV Host attempts to convince him to go commit acts of terrorism in other countries instead.
https://www.youtube.com/watch?v=fA5p82snwhs&sns=tw
One of the End-Time "Signs of Qiyama" is that the Kaaba in Mecca will be destroyed. ISIS has actually said in its magazine that they want to be the ones to do it.