Shamkhani made the remarks in reaction to recent anti-Iranian claims of Mohammed bin Salman, Saudi Arabia's deputy crown prince.
The US and Saudi rulers do nothing to repel terrorism, the official underlined.
He said 'worthless and propaganda' claims of Saudi newcomers and inexperienced officials against Iran should be taken as instances of 'escape forward' and shurgging off responsibility for their extensive support for Takfiri terrorism.
Salman Dynasty has established and leads the factory that is most engaged in creation of terrorists in the world, the official added.
He noted that Saudi petro-dollars are advocating the type of teachings which provoke hatred, violence and crime.
Humiliated and desperate people are the main subjects of Wahhabi ideology and they will be eventually exported after turning into Takfiri terrorists with the Saudi brand, Shamkhani added.
He said, “Despite world public opinion's awareness and hatred of al Salman regime and their role in formation and expansion of Takfiri terrorism worldwide, the new US government has not only refused to negate the Saudi policies, but also support it.”
“Entrance of any foreign troop to Syria without the country’s permission is an act of occupation and equals supporting terrorist elements.”
The Syrian opposition is empty handed in both political and battle fields and they even lack popularity, as a result their real leaders and main supporters have resorted to direct interference and presence in the battle ground, Shamkhani noted.