The question that must be asked is this ...
How is this any different than pharmacists refusing to carry the morning after pill, but are forced to do so against their own personal or religious convictions? Customers can go to a different pharmacist.
Good point. Now what happens when a cab company refuses to hire muzzies because they won't cater to certain customers, or fires muzzies for the same reason?
Well for one thing the pharmacy will still let you in the door to buy whatever they are selling.
Remember back in the bad-old-days of Jim Crow the argument was made that as Walgreens is a private business they can choose not to serve anyone they want. This was rejected. It was decided that "public accomodations" must serve everyone. A taxi is very much a public accomodation. Therefore the drivers must not be allowed to discriminate on religious belief. Cearly in trying to enforce their religions dogma on passengers they are doing so.
The taxi commission should say: no dice. What if a taxi drver said "I won't carry gay couples, because their acts violate my sense of Christian propriety!". Ha! Imagine the outrage.
As far as the pharmacists are going, I think many of them have lost.