From the 23rd minute
Roosh says he will not martyr himself or die for a principle. This conclusively demonstrates the fatal weakness of liberalism and atheism, because it tolerates atheism and laws that flout what are said to be God's laws.
An atheist would believe that this life is the only one. He would therefore cling fiercely to it, unwilling to make sacrifices for any principle and seek as much carnal pleasure in this life before his life is snuffed out. A society consisting of mostly men like this would of course fall to more determined men such as IS terrorists who have no fear of death.
The real purpose of religion is to make men and women prepared to make sacrifices for posterity. Liberalism and atheism is the antithesis of this.