Answer 1

Saudi Arabia is accused of sponsoring terrorism by promoting Wahhabism. also it depends on who defined who is terrorist. Israel and USA call Iran and Hezbollah as terrorists and Iran calls Zionists who attack and occupy Palestine and kill Palestinian women and children in Gaza as terrorists and USA as supporter of terrorism and consider activities of Hezbollah as legitimate defense against Israel. so it is important firstly that who you select as the reference for defining terrorists. for evidences and more information about Wahhabi and terrorism please refer to below Sources and Related links:

Answer 2

Nearly every major country in the Middle East supports terror. Most notably, Saudi Arabia and Iran support large numbers of terrorist and paramilitary organizations. Terrorism is also very common in Iraq, the Palestinian Territories, and Lebanon due to support from Saudi Arabia and Iran.