I have issues that i am passionate about, but don't discuss at work or in other forums because they are not relevant or the discussion appropriate in that place. I go to work to work.

If your friend enjoys her work and wants to stay there, can she tone down her excitement for mother's rights while she is at work (when it is not relevant to what is happening), and she might find that she and the employer/workmates are happier.

It may also help to get her point across, when mother's rights are relevant to the discussion, if her workmates are not just zoning out when she talks because they think they have heard it all before.