Anyone in this thread that has ever eaten meat and said he should get a stiffer sentence is a hypocrite. (yes I realise there's a difference, but it amounts to the same thing)
Kick in the head or bolt in the head, which would you prefer?
Reasoning, you don't have it, and it is the measure by which we judge everything.
Translate it to humans, murdering someone in cold blood, murdering someone in self defence and ending someone's life who has terminal illness and is in an extreme amount of pain with no hope.
All amount to the same thing, so all should be regarded the same? Reasoning, such a simple thing that so many people don't use.
Ask yourself this, would you murder someone in cold blood, how angry would you be if a family member was murdered for no reason. Would you kill someone to protect a family member, how angry would you be at someone who killed a family member who was actively trying to kill someone for no reason. Would you end the life of a family member who wished to die who was in agony and had no chance for anything but worse pain before death, would you be angry at someone for doing this for your family member?
An act is MEANINGLESS, intent behind the act gives any particular act meaning. Killing someone is an act, if it was good, bad, understandable, unfortunately, great, terrible, whatever word you want to use is entirely dictated by the intent for the killing not the act itself.
I don't eat meat because I feel morally as I can live without eating it, I really shouldn't. If I didn't have this option, I would eat meat, it moves from a moral to survival choice in my view. While an animal is effectively murdered, there IS a reason behind it, food, survival. I question the particular morality of that but this was an idea inherited from millennia of civilisation not having the choice to not eat animals(realistically).
The man kicked the cat to death for fun, morally this has ALWAYS been wrong. I can understand the reason people eat meat and why animals are killed, none of them are killed for fun. Fox hunting today is done purely for fun and is morally reprehensible, as is killing a cat or human for nothing more than fun/entertainment.
These things aren't comparable so stop trying to compare them.
Intent is EVERYTHING in these situations, in all situations, ignoring this and comparing the acts alone is completely pointless.... nothing short of ignorant.