Why do we make goat sacrifices ?

As a fellow pahadi I just wanted to ask why do we still make goat sacrifices? . What's the history of it? .

Whenever someone who isn't pahadi asked me why I never had an answer why because all I could say was " it had been that way " , " it's a tradition" . But weren't there many traditions that were bad but we still did it out of " tradition ".

What God would ask for another life to be killed or sacrificed ? . Or is it us who made it that way ?

I'm not here to argue / spread hate I'm just putting out my thoughts and i appreciate all answers provided.