Yeah. It’s one thing to say that actual or recent colonists should be kicked out; another that their children, grandchildren, or great-grandchildren who were born and raised in the land should be mandated to vacate for an insufficiently pure ancestry.

Ethnic cleansing doesn’t become acceptable just because “Other side did it first!” or “The oppressed are incapable of wrongdoing or problematic views”

Decolonization, like you said, is about decolonizing institutions, including institutions of property ownership and wealth that favor settlers; not turning the metaphorical clock back by un-immigrating colonists’ descendants.