In war there are no rules. The enemy of my enemy is my friend. Israel's main enemy is Iran and its allies: Hizballah in Lebanon, the Baghdad clique. In the other corner: ISIS, the Saudi clan, Egypt and Turkey. And the passive masses of Palestine and Syria.
On the other hand, Netaniyahu decided that Israel will not be drawn into the regional chaos. We shall be not involved in the Sunni vs Shi'a business, if can help it.
There is no organized Sunni camp as of now, but it may develop as we move forward. The majority of Muslims are Sunnis - between 85% and 90%. Sunni means "Ahl al-Sunna", the people of the tradition. The tradition refers to precedent established by Muhammad and those close to him. The Shi'a are an heretic minority, the largest in the Islam.
The Sunni are a sect and not a nation and in my opinion, they don't realize that they are our allies. But Ayalon sees ahead, and those vaporous alignments may solidify as time goes.