Ethnic cleansing is a synonym for genocide. You may be under the impression that genocide by modern definitions does not include forced relocation, or that ethnic cleansing necessarily can not include killing. You are wrong. What you probably meant was that forced relocation is a less severe form of genocide than extermination. You didn’t say that though.
“our role” to my ears this almost seems to degrade the level of English participation. Maybe the British hear this differently.