It seems falling oil prices... are the least of their problems...
Saudi officials don’t like to talk about it, but experts who closely follow developments inside the kingdom say ISIS enjoys growing support among ordinary Saudis, who see the group as the true champion of embattled Sunnis in their sectarian struggles against the Shiite-led governments in Iran and elsewhere.
For many Saudis, ISIS also stands for a righteous, austere brand of Islam, while the royal family, they believe, is irredeemably corrupt.
It seems the Saudi Royal family... a major funder and exporter of Islamic fundamentalism is about to reap the whirlwind.