Agustin de Iturbide was a conservative creole in Mexico who overthrew the Spanish viceroy and made Mexico independent, Iturbide wanted to seize power as emperor and avoid liberal reforms from Spain, but many that fought with him for independence wanted liberal reforms.
Father Miguel Hidalgo was a creole priest that wanted revolutionary freedom. He was captured and executed for being the first leader of Mexico’s fight for independence, he defended Mexico’s independence because of the Spanish tyrannical government that made great injustices against the poor of Mexico.
Father Morelos was a mestizo priest wanted a ranging social and political reform, he wanted to improve Mexico’s condition, abolish slavery and give all men the right to vote. He came after the execution of Hidalgo.
We can conclude that Hidalgo and Morelos defended liberty with social reforms for the people of Mexico, but Iturbide wanted to remove Spanish power and wanted it for himself.