[Baron von Kriterium]

There are two predominant trains of thought concerning the events ongoing:

1) KSA/Israel/USA have had their plans foiled in Iraq and Syria. Yemen is not going well for KSA despite an overwhelming advantage. The sanctions against Qatar have not gone as planned, either (IE, they could not get Qatar inline with the rest of GCC). Iran has gained influence in the region - at the expense of KSA. Hezbollah is stronger than ever with battle-hardened troops. Lebanon could now be in the cross hairs in order to eliminate/reduce the Iranian influence.

2) MbS may wish to liberalize the economy. He sees Dubai and might want to duplicate that scenario. To do that, he needs to purge the "old guard". That doesn't necessarily mean he will secularize, though, in my opinion.