I was brought up by parents who were involved with what you might call a cult - a philosophy that covered everything from education to medical care. Me and my siblings were sent to a school run by adherents to said philosophy.
As children, we never saw an actual doctor or dentist. Occasionally we would see the schools "doctor" who was basically a quack. I had terrible eyesight for which I was taken for sight tests and did get glasses but alongside this was sent for "curative therapy" which involved dancing and waving coloured cloths and was only allowed glasses slightly weaker than my actual prescription 
. Obviously we were all unvaccinated.
I had my first two DC at 19 and 21, and relied heavily on my parents for childcare and support when I was a young single mum. As a result they were not vaccinated as I was still trying hard to follow the "rules" of our lifestyle and to make my parents happy (I was a disappointment to them in every way and they never let me forget it). My parents helped house me etc at the time and I didn't feel able to break away. My older DC are now mid/late teens and I have had a fantastic supportive DP for 10 years with whom I now have 2 more children. DP has helped me see just how fucked up my parents views are, and all the DC are now fully vaccinated etc. We are fairly low contact though my parents don't really understand why and constantly push for more contact and to have my younger DC to stay, which I always find excuses to prevent.
So I've just been to visit my parents for Christmas day with the DC after not seeing them for a year, and it's brought it all crashing back to me. They spent most of the day banging on about covid being a scamdemic (my mum sends me endless YouTube clips about this) and quizzing my poor eldest child who is doing A level biology about covid and immunity. I got home and burst into tears. I realise now that me and my siblings are so fucking lucky we never needed serious medical attention as children because they would have just let us die rather than have us seen by doctors. This isn't even an exaggeration, they truly would have done. They would have let us be treated for serious injury I think, but illness would have gone uninvestigated and undiagnosed, in favour of homoeopathy and weird rituals. My youngest is on the ASD diagnostic pathway and that's another thing my parents won't accept - they literally never let up, they quiz me and scrutinise my decisions constantly and it feels so undermining. When my mum found out the DC had been vaccinated she had a massive go at me and then didn't speak to me for 4 months FFS.
I do love them, but I feel so conflicted. The damage their bloody school and it's curative therapy did to me has been lifelong (I'm undergoing adult ASD assessment too now and my quirks were seen as personal failings for my whole childhood)
How do you come to terms with this shit? Talking to them is kind of not an option, they won't change. They actually believe I am the mad one because I disagree with them 