[Kayacterype]

and i thought jihad becomes obligatory when the enemy is attacking and killing muslims as is the case in syria?

Indeed it is..

But I guess this scholar is only talking about the Muslims living in Saudi, who, according to him, should obey the "guardian"(Wali al-amr) and can't go and wage jihad without his permission.
Apparently he's not talking about Syrian Muslims themselves, wa Allahu a'lam..