Or maybe it's missing the notion that - if the OP has been distressed enough by her upbringing to need counselling - religion was used by her parents as a stick to beat her with.
If someone's abused you in the name of Jesus, Mohammed or the Flying Spaghetti Monster it's going to be extra hard to see your kids being told to be grateful to the Being you associate with your childhood misery.
There are many people though, for whom religion is a great source of comfort.
This is the OP's issue; understandable and sad as that might be.
Assuming she is visiting the family who you suggest abused her as a child, I would think child abusers would be a bad choice of people to visit with your children full stop. It has little to do with religion and everything to do with an abusive childhood, if this is the case. I would say, fucking hell, please don't go if they were abusive, but that isn't because they're religious; it's because they're abusive.
I know lots of people who are religious and seem to be wonderful, caring, open minded people and excellent parents.
I am not religious at all and my parents were atheists btw.