I support the culture of goat sacrifice only because it is due to their religion. If animals are killed in a cruel way, then I would not support it. However, there are probably things that I do that they consider cruel like eating the meat from cows. Cows are sacrificed in a sense so that we can eat the meat. Even though it is done in order for us to have food, most of the cow is not used.
Native Americans would find this wasteful. When the Europeans came to the United States, the natives hated that they slaughtered the buffalo because they wasted so much of the animal. The same can be said for goat sacrifice. Animals are killed for many different reasons.