Shia/Sunni divide widens.

The divide between the Shia and the Sunni is widening as well as getting more violent. On the one side is Saudi Arabia (Sunni) and on the other side is Iran (Shia). There are several hot points: Yemen being the hottest. Here is Wikipedia's description of the Yemeni mess: "

Houthi logo reading "God is Great, Death to America, Death to Israel, Curse on the Jews, Victory to Islam". (See here for further explanation)
Active	1994–present
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The Houthis (Arabic: الحوثيون‎ al-Ḥūthiyyūn), officially called Ansar Allah (anṣār allāh أنصار الله "Supporters of God"), is a Zaidi Shia-led movement from Sa'dah, northern Yemen. The group was founded by Hussein Badreddin al-Houthi^[17] who started a rebellion in 2004 which led to a Houthi insurgency in Yemen against then President, Ali Abdullah Saleh. The group has been led by Abdul-Malik al-Houthi since Hussein Badreddin al-Houthi was reportedly killed by Yemeni army forces in 2004.^[18][19]
The Houthis participated in the 2011 Yemeni Revolution, as well as the ensuing National Dialogue Conference (NDC). However, they rejected the provisions of the November 2011 Gulf Cooperation Council deal on the ground that "it divided Yemen into poor and wealthy regions" and also in response to assassination of their representative at NDC.
In 2014–2015 Houthis took over the government in Sana'a, which led to the fall of the Saudi Arabian-backed government of Abd Rabbuh Mansur Hadi.^[20] Houthis and their allies have gained control of a significant part of Yemen's territory and are currently resisting the Saudi Arabian-led intervention in Yemen seeking to restore Hadi in power. Both the Houthis and the Saudi Arabian-led coalition are being attacked by the Islamic State terrorist group.<sup>[21][22]

Saudi Arabia is actively involved in trying to suppress the Houthis and the effort is led by Prince Mohammed bin Salman 30, the King's son. Mohammed bin Salman who would like to expand his operations to Syria, where the local Sunnis are ruled by a small Shia sect of Bashar Assad, supported by Iran and Russia.
Syria is another flashpoint of this war. ISIS controls part of Syria and eliminates anyone opposing it. One effective opponent of ISIS are the Kurds, part of whom are waging a war against Turkey to liberate the Kurds of Eastern Turkey. The Kurds, Turks and ISIS are all Sunni, but are obviously at each others' throats.
Turkey is preparing to enter the war against the Kurds in Iraq and Syria, who are quasy allied with the Russians against ISIS. The Obama regime refuses to deliver the Kurds the promised weapons to them, fearing a response from Turkey. Turkey is part of NATO and if attacked by Russia, NATO is required to come to Turkey's aid. The Obama regime favors Iran and has paved the way for Iran to acquire atomic weapons. Will the Saudis buy weapons from N Korea?

And for promoting all this via the Arab Spring, W Europeans awarded Obama the Nobel Peace Prize.</sup>