It has been scientifically proven that even plants are living beings just like animals and people. even the molecules in the air are living and we kill them by breathing in. this is how we all survive. If killing goats is wrong, then so is eating plants and therefore we must not eat anything and starve ourselves to death. Can we blame a lion for killing a goat for food? No, because it is their way of suviving just like our way of surviving is killing and eating animals and plants(which are also living creatures) and a goats way of surviving is to amputate the roots of living plants and gobble them up. Therefore, it is justifiable for humans to eat non-veg(including goats). When Muslims sacrifice goats of Eid, a third of it is for the family, a third for friends and neighbors, and a third for charity for the poor, many of whom suffer malnutrition and benifit from Baqri-Eid. So, the sacrificing of goats is not inhuman.
