In the movie of Jose Rizal why did rizal choose to change the ending of el filibusterismo?

because he wants to change what happen to simoun in the el fili,such that the original was, simoun was died. we all know that the character simoun in the el fili is no other than the one who wrote the el fili that was Jose Rizal,

in the el fili he wants to reveled or maghiganti sa mga Spaniards dahil sa mga Mali nilang ginagawa sa mga filipino.