I don't think you can really say it's not comparable when painting black people as more akin to livestock than like, people, was a significant part of the rhetoric on why slavery was permissible. The comparison was directly used to justify slavery, and the logic of industrial capitalist exploitation and extermination is still lurking in agriculture today.

That's not to say that slavery and industrial animal agriculture are literally the same thing, but it's still extremely concerning as we hurtle towards ecofascism.