How do religious people justify raising and slaughtering animals for food?

[The Grand Nudger]

Internal logic.  Applying internal logic to a duad model of the cosmos presents a coherent and compelling rationalization. 

As above, so below.  On earth as it is in heaven. Hurt the doll, hurt the man. Feed the representation, sustain the apparition. Goes all the way back to our earliest noticeable beliefs in the hereafter. Another world like this world, with analogs to this world and even overlap - holy places where we locate altars as open gates to the other. A place where an axe from this world is useful and effective in the next, and where a charm or totem given from that world is imbued with unnatural ability in this.

God, in the narrative, goes so far as to give them an architectural schematic for building the door.

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In the wild; they -the animals- eat us immediately, in the most terrible way possible.
They literally chop us to pieces.

But they don't hunt us for fun. We should repay them the same treatment.

Animals do hunt for sport, actually.  They even go to war.

They don't lock us as pets. We should pay them the same treatment and never enslave them if it was ever going to harm them.
The don't eat a "Double human with cheese". i.e they never overeat us. We shouldn't get fat on their flesh also.

They do that too..some of the most interesting relationships amount to livestock operations...and successful predators are enthusiastic eaters. We overeat for the same reason they glut themselves. We both come from a time when our next meal wasn't scheduled. It;s absurd to think that animals don't do this or that that we do..we -are- animals...we share evolutionary compulsions and in similar situations express many of the same behaviors. Zoo keepers have to watch the diet of their charges..not only because of their sedentary lives, but because they will overeat even when scheduled. Fat tigers are just as much a thing as fat dogs or cats....or people. The nuerobiology associated with satisfaction in eating in human beings is common to all mammalian predators. We all eat because it feels good..even when we don't need to, if we can.

Other than that; plants are also alive. So vegetarians aren't that cool if you think about it

Hehe, already knew that.  What I want to ask, in any of the above..is why it would matter what happens in nature?  Does something being natural make it moral -or- immoral?