You make the claim, you do the research.  If there are "numerous instances" surely you can prove it. BTW, what is your claim at this point, "numerous instances of pharmacists assistants refusing to fill a prescription" or "a concerted effort to place pro-life assistants in pharmacies"?  

How do you know the people in question didn't inform management in advance?  And, again, if there is a pharmacist assistant on duty, there is a pharmacist somewhere in the building.  Your own article (which, again, is about a pharmacist, not an assistant) shows that Walgreens had a system in place for another employee to handle the sale and not inconvenience the customer.  It was not followed. And you seem to think this is justification to refuse to hire pro-life people in all pharmacies dispensing contraceptives.  I'm sorry, that makes no sense.  If a woman refused to sell candy to a fat person would you say that stores selling candy shouldn't hire women?