

The premise of most of these type of arguments is that intelligence is something we can measure. Meanwhile, nobody knows what’s going on inside their own brains, never mind other species.
Until very recently we just assumed that animals don’t have a complex inner life because it doesn’t superficially resemblance our own. It’s also convenient to make that assumption if you’re going to industrially farm those animals or destroy their habitats, etc.
That depends what colour your skin is or if you wear any non christian headgear, symbols, etc.