“If the ISIL win, they will definitely continue their offensive against Saudi Arabia,” General Firouzabadi said on Friday.
He described ISIL as a brainchild of the US and UK governments, established to get “revolutionary Muslim youths” killed in Syria and Iraq.
Firouzabadi stated that Saudi Arabia has asked the United States to let ISIL militants destroy Iraq.
“This (ISIL) is also a serious threat, even bigger than Israel,” he said.
ISIL is a Takfiri extremist group which has its roots in the insurgency against the US-led invasion on Iraq in 2006, and was later developed to a bigger group in Syria in 2012.
The group is known to be responsible for mass murders and extremist acts of violence across Syria and Iraq.
ISIL leader Abu Bakr Al-Baghdadi, who was a detainee at US Bucca prison in 2005, has announced himself as the caliph of the Muslim world.