I think they chose to be cruel because of what have happened in the past for them while some deliberately do so just to bully those beings. Some feel happy seeing those creatures suffering.
If you can't take care of something, why bring it home to have as yours or to work for you? They are living creatures so they need to be given the best of life treatment.
Over here, I do see some people get dogs or other pets but can't feed them properly. Whenever I see such creatures with skinny bodies or other state of conditions, I do pity them and always ask myself 'why do they even bother to have these creatures when they can't even take good care of them?'.
Well, there are those who take propeer care of theirs anyway.
Truth is, people are always different and will see things from different perspectives. There are the good, the bad and the ugly.
Yes well said @maxwellmarcusart, many people treated animals how they are treated themselves and others really take their frustrations out on the animals in their lives. It is a tough thing to witness xxxx
Yeh, and it just doesn't worth it. If that's the case, people really need to control their angers and emotions.