I'm not much interested in that particular study. I'm discussing your tl;dr which is

The smarter you are, the less likely you are to change your mind on certain issues when presented with new information

You, clearly, think this is bad. I, on the contrary, think that in certain situations -- to wit, when your stream of evidence is filtered -- NOT updating on new information is a good idea.

I feel this is a more interesting issue than going into the details of that study.