Saudi Arabia is a brutal regime that must be destroyed by Iran, China, Hamas, Hezbollah, Syria, and the Houthis.
I doubt that Xi has any plans to "destroy" a country that seeks to be a willing partner in the BRI, and that has only been developing warmer and warmer relations with China following the ascent of the current leadership of both states.
Hamas has no compelling motive to seek the "destruction" of Saudi Arabia. The hostilities that do exist between Hamas and Saudi Arabia are just an afterthought of the wider hostility between Saudi Arabia and the Muslim Brotherhood as a whole (of which Hamas was/is the Palestinian branch) which have to do with the Brotherhood's conflicting interests with the Saudis, nothing to do with the "brutality" of either side.
The Al-Assad regime in Syria has no compelling motive to seek the "destruction" of Saudi Arabia. Although the Ba'ath Party's ostensible goal is to unite all Arab countries under a nationalist republican regime, the Alawite Assad knows that he could never hope to have the entirety of the majority-Sunni Arab World submit to his geopolitical leadership, and the "Arab Cold War" of the late Twentieth Century is long dead; neither Assad nor the al-Saud have any territorial aspirations over each other's domains. KSA's support for the opposition in the Syrian Civil War was not the result of any thoughtful desire for regime change, but rather merely token/obligatory support done in order to neutralize and counter the Islamic Republic of Iran (the benefactor of the Assad regime) and maintain their credibility as a protector of Sunni/Salafist interests and the opponent of IRI proxies. Since MBS came to power, the KSA has reversed course in Syria and sought rapprochement with Assad's Syria; providing support for the Syrian opposition at the onset of the war provided leverage that the KSA could use to negotiate a stronger guarantee that Assad's Syria would desist from any pro-IRI activity that posed any threat to the KSA, and MBS has utilized that leverage.
