Why are undead inherently evil? Wouldn't animating a skeleton be about the same as animating a golem?
------
I'm glad you asked! I've actually covered this before (and here as well), but it's a fun topic I like discussing, so:
Negative energy is anti-creation. For a living creature, positive energy is the default; their bodies are built to reflect this, as all bodies have the capacity to grow, change, mutate, etc. If you suddenly swap out positive for negative energy, you're essentially taking a hydraulic system and swapping all the water out for syrup.
That's not a very good metaphor, but that's why even using Animate Dead to raise a mindless skeleton or zombie is seen as inherently Evil, since you're forcing two anomalies into existence: you're twisting negative energy into performing a function it isn't meant for, inside of a system that's actively damaged by its presence. Personally, in my own games, mindless Undead are morally neutral to raise, but if you start instilling intelligence into them things start getting messy.
A sapient mind isn't meant to handle negative energy. The mind can only interpret stimulus in so many ways before it defaults into discomfort, fear, or pain because it doesn't know how else to translate the sensation of, essentially, "you are an ice cube in the middle of a wildfire." The mind is suddenly deluged from all sides by an agony they can only relieve by causing ruin, fostering stagnation, and snuffing out nearby "fires" (sources of positive energy (living creatures)).
If you ever wonder why so many Undead are universally hostile to the living, it's because life literally hurts them to be around.

















