Why is Saudi Arabia suddenly so paranoid?

Saudi Arabia intervened militarily in Bahrain and Yemen. It helped finance the 2013 coup d'etat launched by Abdel Fattah el-Sisi in Egypt

In the past, Saudi Arabia depended upon its enormous oil wealth and the United States for its security. It used the former to buy friends and pay off enemies and potential enemies. It used the latter to guarantee its survival. With a few exceptions, Saudi Arabia did not involve itself directly in the affairs of its neighbors.

Over the course of the past decade, however, that has changed. Saudi Arabia intervened militarily in Bahrain and Yemen. It helped finance the 2013 coup d’état launched by Abdel Fattah el-Sisi in Egypt. It has