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This is the logic of fascism. It happened in colonialist empires everywhere.

There are examples in the US, South Africa, and Rhodesia where white workers unions organized to prevent black slave labor from taking their jobs.

This is also where a lot of the anti-Chinese racism came from because Chinese immigrants were replacing higher paying white rail-worker jobs. It was a point of conflict between the American white working class and the American bourgeoisie who would rather employ Chinese worker they could pay inhumanely low wages to (although the reason why they were so exploitable was because of racism).

It's revisionist to say that this was entirely imposed upon workers from above. White workers were given the easier choice to improve conditions somewhat for themselves without risking much by punching down on colonized workers. In every scenario where this has happened in history, the majority of the racially privileged working class have always sided with colonialism against the colonized working class (it is a statistical law) because it was the safest and easiest way to guarantee some economic security.