How is that “dehumanizing” when human is literally in the explanation. Had it been “female apeoid” I’d have agreed, but humanoid… So “moid” for male humanoid is “dehumanizing” too?

“A humanoid is a non-human entity with human form or characteristics.” https://en.wikipedia.org/wiki/Humanoid

A humanoid is by definition not human, hence calling a human a humanoid is dehumanizing.