It happened in various stages. I learned everything in the late 90s and was just a teenager. I would argue and argue with my mom. Eventually I almost ended up in a judicial comittee. Fast forward this many years the only anger I get is how obvious it is that its just a farse but my family gets more convinced it's the truth with each change. I know there is nothing I can say or do which I have come to accept for many years. My parents will grow old and die always convinced the end is so close.
With my family I have learned that nothing you say or do will change their minds. My parents are both now gone but they went peacefully thinking this was the truth and had a hope that they will wake up in that paradise world. Who am I to take that hope away from them. Even though we had a good relationship as my parents learned toward the end of their lives to accept me for who I was.