This is utter BS. Some of the nicest and most level headed people I know were home schooled from really religious families. There are different types of religions. Some are more showy than others so don't lump everyone into one category.It's not an act, it's just who he is
pro tip to parents: don't homeschool your kids. especially if you're really religious, they'll end up being weird jesus freaks and odds are they won't make it to the NFL