You need a psychiatrist. Regular docs know nothing about these meds. At any rate, this doc isn't the one for you or anyone else. Doesn't see you as an individual but as part of his prejudice. Benzos are difficult meds and are getting harder to get around the world, but if it's the only thing that works for you, that should be listened to. Psychiatrists tend to be more aware of this problem, though they have their limitations on thinking as well. If you're under the gun timewise, there are two possibilities -- contact your old doc and see if he'll give you a refill or contact this doc, and if that's not possible, tell this doc that if you go into withdrawal and suffer a seizure (not common, but benzos are also anti-seizure meds and must be discontinued carefully) or any long-term effects, he'll be supporting you for the rest of both of your lives from your malpractice award.
i would absolutely find another doctor. this dr is beng irresponsible to expect you to stop cold turkey.