When confronted with dogma-threatening, worldview-menacing ideas, your knee-jerk response is usually to lash out and try to bat them away, but thanks to a nearly unavoidable mistake in reasoning, you often end up doing battle with arguments of your own creation.
Your lazy brain is always trying to make sense of the world on ever-simpler terms. Just as you wouldn’t use a topographical map to navigate your way to Wendy’s, you tend to navigate reality using a sort of Google Maps interpretation of events and ideas. It’s less accurate, sure, but much easier to understand when details aren’t a priority. But thanks to this heuristical habit, you sometimes create mental men of straw that stand in for the propositions put forth by people who see the world a bit differently than you. In addition to being easy to grasp, they are easy to knock down and hack apart, which wouldn’t be a problem if only you noticed the switcheroo.