Some people are not human?

I wouldn't have thought so in the 80's or the 90's, or maybe not so intensely. But nowadays, I frequently have to think: this person is behaving like this, like he or she is not human. And then, I had the theory that, if the world had 2 billion people before, and then 4 billion, 6 billion, and 8 billion now, where do the extra 6 billion souls come from? Do they have to come from the souls of insects, reptiles, rodents, and other animals? And then when I read the Six Paths in Buddhism , there are 6 paths of beings reincarnation: 1. God / Heaven path 2. Human 3. Demigod 4. Hell 5. Hungry spirits 6. Beasts The first 3 are Virtue paths, and the last 3 are Evil paths, and Demigod is into fighting, so they are sometimes considered to be the Evil path. So if the number of beings in each path is even, then it explains well: only 33% of people we see are the God / Heaven or Human path. The other 67% are Evil path. It could be the Hell path that would hurt people no matter what, the Hungry spirit path that are extremely selfish and always ponder how to take advantage of others, the Beast path who are apathetic to others and have sociopath personalities. Can the Six Paths correctly explain it?