The 2014 ACA Code of Ethics states that it is unethical and discriminatory for a professional to refer a client because the professional disagrees with the client's values.
The 2014 ACA Code of Ethics and Ethics Information:
http://www.counseling.org/docs/ethics/2014-aca-code-of-ethics.pdf?sfvrsn=4
https://www.counseling.org/knowledge-center/ethics