They are not. The modern GSD is only about a century old, but is a standardization of three foundational breeds of working farm dogs that have been around for a

They are not. The modern GSD is only about a century old, but is a standardization of three foundational breeds of working farm dogs that have been around for ages. Aggressive does not work well with herding - they're surrounded by prey all day. Looks like you just had bad luck.