I kinda see where he's coming from here though. Saudi Arabia sends a constant flow of funding to Shariah-based Islamic schools in Europe that churn out ISIS sympathizers.
I get what you're saying about removing leaders that actually work consonant to our goals. However, Mubarak et al weren't funding subversive movements in Western countries.
Saudi Arabia is an ally. But I question its overall usefulness (compared to, say, Israel or Georgia) when it's encouraging the growth of weeds in our own backyard.
Suppose for a moment Saudi Arabia was absorbed into the ISIS fold, thus consolidating more of the ME into a singular body of hostility. What's the most we lose?