Yeah even if he has a point he's expressing it in absolutely the worst terms. At core I agree, these metaphors are bad because when you have to explain them to people you end up also making racism rational, when it fundamentally isn't. I think maybe Jack Saint talked about this in the context of Zootopia, where the racism directed at predators is based on a history of violence and actual concrete biological distinctions that make one group objectively more capable of hurting people than another.

But to express that criticism as "I hope we can do a genocide on these people" is the most way to say it.