Other than Righteous Cultivators and Evil Cultivators, there is another type of cultivator called Demonic Cultivators.
They follow the demonic cultivation techniques, demonic methods and thanks to the fewer cultivation restrictions, those who have less cultivation talent tend to follow the Demonic Path.
Between the Evil Cultivators and the Demonic Cultivators, the Righteous Cultivators hate the Demonic Cultivators more.
One reason was the demonic methods they followed, and the other one was, these people were all humans once who willingly chose to walk the demonic path for strength.
Also, due to the demonic methods they use, the Demonic Cultivators are stronger than the Righteous Cultivators and physically, they are even more powerful than the Evil Cultivators.
What's more, thanks to the same demonic methods, which were complex and unique, they are much more difficult to deal with compared to the regular Nascent Soul Realm Cultivators.
