There is nothing endangered about Deer in the first place. It's like saying horses are endangered in America but Horses were brought to America in the first place. It's also like saying Humans with a mole on their nose is a special class of people who should be put on life support at age ninety for fifty years.
This was a perfectly ruined chance to bag some venison for dinner. How often does a hunter get the chance to bag a deer with a buck knife?