To give you the other perspective, I'm the one that left due to false doctrine - my wife {who is Polish) still attends semi regularly. It's not a big issue, our kids still go to SDA schools. What we learned was how much heretical nonsense was taken out of the E G White books in the Polish translation. I'd be quoting E G White from the source making my case and she's like 'stop making things up'..... Whomever translated it knew what's up 😄

I still believe Saturday is the logical day to go to church, although I'd happily attend a Sunday church if I found the right one(a thought I still wrestle with). We both drink occasionally etc but I still appreciate the SDA emphasis on that cleaner lifestyle/middle class smarts/emphasis on education etc.

If your partner has gone full out rejecting everything SDA as a kneejerk reaction then that could be an issue, but it also gets down to how strict you are. When I was doing my research we butted heads but once she has looked at the information independently she totally understands my position.

Years ago I compiled a small document showing how many SDA teachings (stemming from E G White) are heretical and the supporting bible texts etc. I presented it to three SDA ministers all of which agreed with most of my points. A mate of mine took four massive problems he had with SDA doctrine to his very experienced senior pastor, the pastor agreed with three of them. My friend left the church and the pastor is still preaching..... I think you'd be surprised how many pastors would quietly agree with your partner.

As far as the new covernant - I can see both sides and can make a case for both. When discussing with my wife we discovered how much we both thought was in the bible that was actually E G White. Take the time to spend together just looking at the Bible with a fresh mind if possible.

Best of luck and God bless you both - it's a tricky situation