That's actually a terrible reason to fund armed groups. Al Qaeda's original mission was to replace the Saudi monarchy; there were many attacks in Saudi Arabia a

That's actually a terrible reason to fund armed groups. Al Qaeda's original mission was to replace the Saudi monarchy; there were many attacks in Saudi Arabia after 9/11, they weren't talked about much. So the Saudi monarchy is not interested in helping those kinds of groups. Armed groups are often funded by wealthy individuals for a variety of reasons (Osama bin Laden being a famous example). Armed groups funded by the Saudi monarchy are in other countries, fighting the regime's enemies by proxy (eg. the Syrian and Iranian governments).