What was the reason for khomeinis success?

The reason behind his success was faith in truth, faith in God! He was a true leader if he would not come in Iran today Iran would be like Iraq, Afghanistan. Shah was a dog for American's who was obeying them, people were dying in Iran, and he was doing parties in his country, to make his master happy! Khomeini rejected all of it, and he did what was shah duties, he brought peace in Iran, shah didn't allow him to come in Iran because he knew he would bring the revolution, and his government would be finished!

Khomeini rejected America's offer, they wanted him same as shah a dog for them in which they have the dog ruling Iran, and they have the rope tight around shah's neck controlling him!