Dave Anderson’s column, “The truth is that our citizens are not polarized,” [Dec. 30, Opinion] constructively shows that Americans are less polarized on issues than commonly thought.

However, he misses a more dangerous form of polarization: social polarization. It’s not only that people like or dislike people based on agreement or disagreement, it is also that they form opinions based on who supports or opposes them. This was made clear when Sen. Mitch McConnell declared his No. 1 goal was blocking President Barack Obama’s proposals. For eight years Republicans rallied against “Obamacare” despite general support for most of its particular features. Polarization based on enemies is what needs to be addressed.

William Roy, Everett