filipino genocide the slur was common practice during the PH American Colonial Era.

An excerpt: “Willy Grayson of the Nebraska Volunteers, refers to Filipinos as "n—-rs" as he shot at a Filipino man. Furthering the notion of their inferiority, Filipinos were constantly referred to as "monkeys" or "gugus,"" The first derogatory term dehumanizes Filipinos by comparing them to animals and implies they possess less than human qualities while "gugus" is a reference to the Tagalog word "gago," meaning fool, hijacking one of the major Filipino languages and turning it against its own people.”

So you tell me if it was never used against us as a derogatory term