Saudi Arabia believes in Islam?

Mecca, the seat of Islam, is in Saudi Arabia, which regards itself as guardian. Only Islam is permitted to be practiced in Saudi Arabia, and the version there is the Wahhabi sect of Sunni Islam, one of the most conservative sects

Yes.
It is a theocratic state. The government publishes Wahabi [ spelling of wasabi? ]texts for export.

Islam came out of SaudiArabia.. MOhammed, the prophet of Islam was from SAudiARabia... Mecca, the islamic center of the world is in SaudARabia..