Well I don't really have a point myself, the study has a point which is emphasizing that these neural processes measured aren't a direct representation of political opinions per se.
I guess my only relevant opinion aligns with what they are saying in better ways in the study, to which I would add that it gets dicey whenever people's thoughts/behaviors are reduced to something inherent about their biology. The authors of the study are putting in a good effort to avoid that reductive interpretation and explaining it very well. Biological indicators and many subsequent indicators are determined in complex ways by the conditions people are in and where they were born, etc.