Doesn't need to be an invasion, if Saudi regime fell it would likely be replaced with something very religious and would be happy to support Hezbollah or any nu

Doesn't need to be an invasion, if Saudi regime fell it would likely be replaced with something very religious and would be happy to support Hezbollah or any number of groups that would attack Israel and keep themselves distant. Plus religious nuts are just that, nuts and don't always consider the repercussions for those left behind.