... I think most of the giraffe bone people came over the ram side partially due to some other members ethics...
That doesn't entirely solve the problem. Rams don't shed their horns, so you kill the ram to get that horn. Or you get that horn when you kill the ram. Either way, that sheep's gotta die. So long as the bone is sustainably sourced, it's all the same. And then, some people feel that even using shed antler is wrong because it's an animal product. Like oil. It must be a real booger to live your life without any synthetic fiber, plastic, gasoline, electricity, power, water, computers, phones, farm-raised food, fabric, thread, needles, etc. You could live in a log cabin with an axe ... oops, manufacturing that axe took a bunch of dead dinosaurs, not to mention animals that used to live where the iron mine is. So make that a stone axe.
And even if you live off the land by foraging, so as not to kill any soil-dwelling critters, you're taking food from the mouths of other herbivores. There's less food to go around, so more of them die trying to reach adulthood and reproduce. If you're alive, you're complicit in the killing of animals. People need to deal with it, not try to get others to pander to them. The amoyna burl scales, and the rest of the knife, requires that animals die. The only ethics involved lie in deciding which animals are more worthy of death than others. The best thing you can do is vote your preference. There's no way to cater to every belief system because they contradict each other and some even contradict themselves. Let the person with a problem deal with it in their own way. Down any other path lies madness.