Generally KSA isn’t a terrorism exporter.
They export radicals for others to use.
They are murderous and duplicitous, but unlike NK, Russia, Iran, terrorism isn’t a state sponsored activity.
One may also point out that while they are generally not very nice folks, unlike some other folks in the gulf the Saud Royal family have not been linked to terrorism financing either.
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Realistically while Iran may consider Israel enemy number 1, as far as regional targets for Iran, the House of Saud is #2 and high on the list of people to exterminate — occasionally being displaced by Jordan due to Jordanian military activity.