As a die-hard Vegan ....
Killing for food, I can live with. It's what we've done for centuries, I'm not over the moon people still do it but I tolerate it.
Killing for fashion (ie. fur etc), Jewellery (eg. Ivory) or just to have a head to hang on your wall is unnecessary killing, it's senseless, in terms of fashion it's superficial and I class it as senseless and moronic on the humans part.
Matt Hughes I don't have a lot of time for as a person, but I think he's within his rights to do what he did.
Miesha Tate / Ronda Rousey / Rick Hawn / Ian McCall / Mike Pyle