These uprisings "keep" happening because the Saudis and the usa provide funds to these rebel groups to oust the Shiite (alawite) regime. In Bahrain, a Sunni minority government is ruling the state.

At least Alawite goverment looks out for other minorities. Sunny majority government is going to be devastating for everyone who is not Sunni.

Majority of Syrian Sunnis support the government. Majority of Syrian army is Sunni.