That is not correct. They believe animals have no soul because they want to eat the animals, but actually animals do have a soul. So, all these similarities are there. That is not logical. In logic there is something called analogy.
Analogy means drawing a conclusion by finding many points of similarity.
That is not logic. That is not science. In this way they rationalize that there is no sin in animal killing. Actually animals are not dead stone, but the killers of animals are stone-hearted. Consequently no reason or philosophy appeals to them.