Medical and religious reasons are totally exempt in my book. Though I strongly recommend getting wasted on Raki with (Muslim) Turks. They have hollow legs. And it totally breaks down any preconceptions or irrational prejudices one might have. I once had a Pakistani Muslim over for Christmas dinner, and I offered him some single malt scotch. He said his duty to accept my hospitality outweighed his duty to abstain from alcohol. We had an excellent time. :)

But really if it's medical, it can't be helped. And if it is really a matter of faith, then abstinence is absolutely worthy of respect.

They don’t have to deal with someone who are incapable of seeing people beyond their well-reasoned sobriety. I, for one, consider it a win.