Overall I agree with your sentiments on religion and what you teach your children, but I couldn't disagree with this quote more. It's this mentality that allows bigotry, racism, and other terrible things in the world to persist. Please don't get me wrong, i'm not saying you're a bigot or a racist (rather I'm just trying to use obvious examples to make a point), what I'm saying is that in order for a racist to stop being a racist, they need to change the way they think about things, no? They need to change the way they view people of other ethnic backgrounds, to accept the idea that these people are equal.
Now, perhaps I'm misinterpreting your quote. Perhaps what you meant was something akin to, "If you have to abandon critical thinking to accept an idea, then stop right there." If that's the case, then yes, I'd agree, and you can disregard the above paragraph.