Rhino Hunt Story

In Texas, there was an auction for a permit to hunt a Black Rhino (an endangered species).  The auction stirred up controversy. After the permit was auctioned, the club that sold the permit received threat emails. For example, one of them said “for every black rhino you kill, we kill a member of the club.” Scientists say that there are only 5055 black rhinos left in the world. Their keratin-based horns, that are made out of the same material as your fingernails, are sold on the market in Africa as medicines. Normally, hunting the black rhinos is considered poaching which is illegal, but with a permit it isn't. In my opinion, even with a permit, it isn't right to kill such an animal. Do you?