Why do certain gods always require something to be brutally killed in order to be satisfied? It seems to me these are the ones I'd want to stay away from.

The animals are not brutally killed. It is very quick and humane, and usually the animals are used in a feast afterwards.

he animals are not brutally killed. It is very quick and humane, and usually the animals are used in a feast afterwards.

but

Why do certain gods always require something to be ** killed in order to be satisfied?

Why do you feel that satisfying Gods is the case here?

(and please give a logical counterpoint response. I'm pushing this because of the blanket idea that this is always the case)

source: http://www.religioustolerance.org/santeri1.htm

They feel that the sacrifices must continue because their Orisha require the food. (The Orisha are various manifestations of God).
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source: http://cuban-exile.com/doc_326-350/doc0337.html

"According to the beliefs of Santeria, each person is born under a particular guardian saint (Orsha) that must be worshipped [worshiped] throughout life.

Most formal Santeria rituals also require the use of sacrificial birds and animals. Each of the saints is ‘fed' his or her favorite food or sacrifice."