The definition of veganism is only about so-called "non-human animals" and trying to cause less suffering to pigs, cows, fish, chickens, etc. However, compassion for sentient life is usually a common theme amongst vegans! It can seem that they care more about animals than humans, but it's only because animals can't speak up and that vegans can get frustrated with non-vegans — they do the very thing every day that a vegan opposes.