What does it mean to be inhumane? When do your actions cross from human to grotesque? What does it mean to be human, to act human? Wouldn't you be able to describe every action done by a human as human, since it is a human doing them? So what does "inhumane" mean? Is it just a word used to describe things that people do not understand,things they are afraid of?

Humans are wicked. Everything they do is normal for them. Every action they do seems wicked but its only being human. They feel but don't understand.

To be inhumane, means a human without compassion in what they do. They do not feel or care about their actions.

I believe the word inhumane is simply an expression used by people who needed something to call someone else that makes them different in a bad way.
For exemple you could call a criminal inhumane because of his/her actions only to define the difference between yourself and the criminal, to show that your better than him and should therefore be treated like it.
Maybe that was a little extreme of an example, but I hope you understand the point.

i agree, they are called humans, but they do lackhumanity. isn't it funny? i just respect and give my life to those who are kind to me, stand by my side, accept me as i am with my bad side and the multitude of mistakes i do, and help me, and treating me the best. they are the only people who deserve me an ddeserve my time and energy because they get me out of my deepest fears. that is it.

I think they are 2 cause human call something inhumane
1. Because the act they see is different from their way of living
2. Because it is contradictive to the rule human made. The rule is made by a group of people with higher status than a normal human,e.g. Governors

I like to look at definitions lexically.
(taking into account similar words)

We have the words humane and mane, to look at additionally.

Manes on horses and lions are symbolic of gerontocracy.
(long hair implying age; age implying deeper ethics)

If we treat humane as a portmanteau of human and mane,
actions which are humane would be encouraged by the gerontocracy while actions which are inhumane would be discouraged by the gerontocracy.

Think about that old saying: "what would your grandparents say?"

This is obviously silly for some, because grandparents aren't inherently obligated to take giving advice very seriously.
Also, whose to say the elders will agree.
This relies heavily on the idea that the deepest ethics will tend to share the same foundational principles.

But then, what are ethics and morals?
Very relative rules distinguishing healthy conflict from unhealthy conflict.
I don't want to turn this into a lecture lol