Ayatollah Khomeini lead an opposition movement in Iran against Reza Shah Pahlavi to overthrow the authoritarianism type of government that the people disliked and create a new government. The people were fed up with the rule of Pahlavi and they wanted the change. Ayatollah Khomeini took advantage of this mood and returned to his country from exile.
Heaven and Earth are ruthless;To them the Ten Thousand Things are but as straw dogs. The Sage too is ruthless;To him the people are but as straw dogs.—Tao Te Ching(天地不仁,以万物为刍狗;圣人不仁,以百姓为刍狗。)
In fact, we Chinese seldom consider religion seriously. As we know that our life cannot fully depends on gods.
Fall apart because let's be honest this country is already falling apart.