I'd like to meet your ignorant ass.  Yell at the damn owners not a man just doing his job. Pretty sure it'd be illegal and not taught at school if it was inhumane.  You probably don't believe in spaying or neutering either.  You don't deserve a free will.

Save Our Paws says:
     In the United States of America, unlike other countries, it is still legal to perform declawing surgeries as well as debarking and the cropping of ears and tails.
      At veterinary schools, as well as all other medical schools, all surgical procedures are taught, regardless of whether the students and teachers agree with the inhumanity of the procedures.  Declawing is the amputation of the last knuckle on each toe on each paw.  After the surgery, the cat does not receive any pain medication the way human amputees do, and they still have to use the litter box with bloody stumps.
     A practicing veterinarian knows all the pros and cons of declawing, but chooses to ignore everything because of the amount of money that is to be made at the expense of someone who cannot speak for himself: the cat.
It is definitely the veterinarians fault for not educating the owner thoroughly so that the owner will change his mind about declawing his cat and seek other methods for saving his furniture, like a scratching post, nail covers, etc.
     Spaying and neutering are the most necessary means of preventing unwanted animals that spend their life in shelters waiting to be executed for the crime of being born.
     I prefer to keep my religious views out of this conversation, but thank you for asking.