I am sure my nieces believe that their grandmother and I would never be gender critical. We are very left wing, very supportive of the lesbians and gays in our family, very accepting of people’s life choices and very caring, compassionate people.
We don’t discuss this with them because we know that their beliefs come from a place of compassion, rather than logic, and our time on mumsnet shows that people whose entire social groups are convinced twaw find it very difficult to appraise the logic behind that mantra.
We know that their holding different opinions to us does not negate or lessen our love for them in any way, but we are not certain, as shown by you having cut off your one gc relative, that this will be reciprocated.
It’s very sad that families survive being in different sides of Brexit, being mixtures off right and left wing, believing in different religions, but they don’t always survive differences of opinion in this topic. I’ve never seen it be the gc side who cut off relatives over this.