Is it costing you a lot of money to see this nutritionist, and is he (she?) helping you with any current health problems, in spite of the disagreements you're having about fermented foods?
If this person is still helping you, it may be worth continuing to go, even though it's not a perfect fit. If this is fully covered under your health insurance, it may well be worth a little inconvenience and frustration if it's helping you at all. I feel that way about my kids' pediatricians- the checkups are mainly a waste of time, but it fulfills needed school paperwork and it only costs me the gas to get there, plus I keep a relationship with a doctor in case of some kind of emergency. For that, it's worth ignoring some of their advice.
However, if this person is no longer helping you, and/or it's costing you a lot of money for each visit, you may want to simply "stop going" and save up the money for a visit to CT to visit with Dr D (or one of his associates or students.)