In seeking to coerce these pharmacists to do what you, not they, think is right, you are both forgetting an important element in the story:The Illinois Right of Conscience Act. That act gives health care personnel the right to refuse to deliver any health care services which are contrary to their consciences (or "sincerely held moral convictions"), unless there is a medical emergency. It would appear Walgreens, for whatever reason, is in violation of that law, and the pharmacists really ought prevail.
http://www.cathmsa.org/chicago/IL_Conscious_Com.html
I was unaware of that law, but if that's in place as stated that changes the picture greatly.