Thats how my parents treat religion, they know God isn't real and they believe in science. They do however attend church when possible, and choose to live by the moral rules created by the bible.
My parents brought me to church almost every sunday for the first 13 years of my life. Then I chose not to be confirmed due to situations in my life that had lead me not to believe in a higher power like God. People ask me why I don't believe in a higher power.. I don't know, I just don't feel like there's anything along the lines of a god I guess. I do believe in morals though, and thats the difference between you and me. I don't need a silly book to tell me whats right and wrong. Its pretty easy to decipher the right decision in a situation. I know not to kill, rape, or fuck my neighbors smoking hot wife. Not because the bible says so, but because I know I don't want any of those things happening to me.
I'm not going to say people can't believe in what they want to, but I will say that religion is a false security that way too many people look to seriously when in a problem.