The way the characters interact with eachother...
Is like how an Autistic person would imagine ''this is how people act'' if they imagined a world through their own eyes. Everything from the dialogue to the odd mannerisms. Since Tommy Wisseau wrote the entire script, directed, stared and produced the film I think that had a lot to do with it. I don't mean that in a disparaging way, it's a fairly accepted theory that Tommy has some form of Autism and he probably thought the movie and even the title made perfect sense to him.
I feel like the movie is ''Tommy's world'' and we're stepping inside his mind and how he views reality as the result of being on the autism spectrum and being foreign. He really has no idea how people really interact and he doesn't seem to be in our reality. It's interesting.