Do individuals of low IQ who identify with Christianity misinterpret it and therefore aren't really Christian?

I am very skeptical towards individuals who aren't too bright and consider themselves Christians. I am skeptical towards the validity of their interpretation of Christianity as opposed to how an intelligent Christian interprets their religion. When religion and low intelligence is brought together, surely you can see the distinction between their faculties to apprehend cognition/understanding of it's context. "Christians" of lower intelligence seem to have merely a superficial understanding Christianity. In fact, this woman I work for shows some worrying signs of this. For example, one of our office computers was laboring from registry errors and hadn't been defraged in a while. This caused her a lot of distress so Bill and I who are both Christians fixed the registry and defraged the computer. "There is God in everything. You see boys. God is with us." She said. She didn't thank us for anything. She attributes anything and everything to God! Is it fair to say that she is misinterpreting Christianity and therefore cannot possibly be a Christian?