I've heard of those opposed to the SDA church - and many other denominations - but I always recall the booklet that God used to show me what had happened to me: that I had been spiritually reborn. It was "Steps to Christ" from the SDA church. I was so thankful for that booklet years ago and thankful for whoever left it for others to read. I had been very confused by the radio preachers and name it and claim it hucksters. I knew so little back then and didn't even know about spiritual rebirth. I didn't seek it, but I came to understand that I had been spiritually reborn from that booklet. I got copies for my family recently as a matter of fact. So I don't believe that God would use a false church to show me what had happened to me, because back then all I had was God. I didn't know any Christians and when I returned to our Catholic church to speak with the priest, he couldn't guide me - probably because looking back, he most likely wasn't spiritually reborn himself. Not saying that no Catholics are, just that I don't believe that priest was or our conversation would have been much deeper - more than him telling me the CC was the holy mother church.
I'm not going to veer off into another direction this late in the game
I just never thought of when the Catholic church was even formed - and I know that different people/ denominations hold various beliefs. I went to mass every Sunday, went through CCD classes and I don't know how the CC even came into being, why, or when. In trying to sort it out, looking back I don't think there were any generational Christians on the Catholic side of my family. But my great-grandfather was a pastor on my mother's side. When my mother married my father she had to promise to raise any children Catholic. That annoys me because I feel that I missed out on Protestant teaching growing up and I think someone in my mother's side dropped the ball.
I'm not sure of the Sabbath day issue yet. It's not something that I feel an inclination to study - I have a desire to learn Revelations because of all that is happening in the world now.