Tolerance is accepting people for what they are, not what you hope them to be. If a business owner or a professional tells a client that he will not be able to service a customer due to religious or emotional reasons, that customer should simply take his business elsewhere and actually thank the person for their honesty. Should a pro life physician be forced to perform an abortion?
They've tried that already.
A few years ago (I think it was during the Clinton administration) they tried to institute federal regulations that required every medical student to perform at least one abortion in order to graduate with an MD. It was part of Hillary Care, IIRC.