1). You alter your opinions when your beliefs are challenged with facts and you try to incorporate the new information into your thinking.
2). For some people when their religious convictions are challenged by contradictory evidence, their beliefs get stronger.
Question is how to change the 2nd category., And I think teaching Golden rule and protecting freedom of expression right from their school years can do that job..
. Problem being that this evidence isn't viewed as being contradictory by the believer.