I guess being a person who wants to be a teacher I should try and weigh in on this.
I do not in anyway think that raising your child in accordance with your religion is wrong or brainwashing. First of all children start with a blank slate (aside from the basic knowledge of survival like the rooting reflex or stepping reflex or what they learn in the womb). So there really is nothing there "to wash". Now disallowing your children to make their own decisions because you disagree IS brain washing, and if you think even for a second that only religious people do it your dead wrong.
One of the students I worked with in a school was living in an atheist family, his friends were Christian and invited him to church. Said parents said no told the kid who couldn't play with his friends anymore AND asked me and the teacher to make sure the other students don't talk about religions during class time (wish they have legal right to do). Those parents were just as much indoctrinating their child as a staunch Christian who won't let their kids hang out with other "non Christian kids" or read harry potter, or watch Disney movies etc etc etc.
Many parents see religious trips (like church on Sundays) as a family bonding experience, and it is. Brainwashing is when you go to extremes not to allow any new knowledge to enter your child's brain thus keeping them firmly planted in your small scope of how you want them to view the world. This does not mean that you as a parent shouldn't be aloud to have them be a part of what is a important part of your life. Just understand that they will make their own decisions one day and you shouldn't do anything to hinder that. Stopping any kind of knowledge growth for a child in my mind is a form of abuse, but teaching children about your religion is a type of knowledge growth. It is the knowledge of your background,culture,life.
As stated in my example above, even atheists can indoctrinate their children.