Sadly being homeschooled can very easily lead to this kind of attitude. Both my younger brother and myself were homeschooled K-8 and having gone through that experience I can say that while many children do end up with this sort of attitude not all do.

One of the major reasons for this is that most suppliers of homeschooling text books have an extreme religious bias too them whether it be part of a science text, math text, or literature text. However once our parents discovered this they took special care to help my younger brother and I understand what exactly was going on in the situation. Now both of my parents are religious people (Methodist to be exact) and we were raised going to church and Sunday School every Sunday. However our parents were unwilling to allow that kind of bias in their children's education which would have completely stunted our intellectual growth as well as our ability for critical thinking. Every time something would pop up in this vein our mother would give an explanation and offer other avenues of thought which were more scientifically grounded and when our father got home would be informed of what had happened and would make sure we had brushed up on the more scientific and secular readings given to us.

Fast forward to the present day and my younger brother and I both have college educations, understand the difference between bias and scientific reasoning, and he enjoys and agnostic life while I enjoy my atheist one. However due to our unique experience we understand the difficulty of and challenges of a homeschooled education. And while religious reasons and aims is certainly a majority of the reasons, and outcomes, for homeschooling they do not represent the entire group. My brother and I are proof of that.