Minus the religion, my family's level of denial was similar. Because I'm not officially diagnosed as autistic yet (beyond Klinefelter's Syndrome, which has some shared symptoms) I was always being blamed for things I was doing that were outside their accepted norms. My mother was a glass-technology scientist. My dad was a specialist welder working on power stations, oil rigs, etc. And there I was, struggling to tell the time, do basic mathematics, communicate and socialise... clearly it was all my fault, as far as they were concerned. So every time I failed, they blamed me for it. The one and only time they took me to see a child psychologist he made it even worse. I don't blame him for missing the KS diagnosis, because you need a blood test to spot that, but I do blame him for the part where he more or less told my mother "there's nothing wrong with him; he's just doing it for the attention", because this 'official source' did nothing else except confirm all their biases and give them a green light to carry on the same way.
Family ignorance can be a heck of a mountain to climb, and I haven't summited yet.
"doing it for the attention" was a popular line in my family. Now that I've gained the awareness, confidence, and ability to articulately respond to any silly comments like that, it's all stopped entirely and I'm allowed to be my "weird" self. But that didn't happen until my early twenties. I have to regularly talk away rising feelings of resentment and focus on the fact that it's better now. Is your family any better now that you're older?