The biggest subhuman trait by far

[AstroSky]

No, it's not related to looks.

It's hating children and animals

Not because it's the worst imaginable act, it isn't, but because it's the most dangerous seed of subhumanity. It represents the rejection of innocence, trust, and helplessness, the essence of cruelty.
Yes, abuse and murder are worse, but those acts can only manifest out of this subhuman mindset.

To hate the vulnerable, those who rely on our protection and empathy, requires a fundamental failure of human decency.
If you hate what is pure and innocent, you’ve failed as a human being, full stop.

Just end it at that point.

So True. Imagine hating a child who doesn't know better.