Nyhan says that’s because when it comes to politics, there’s a weak incentive to hold accurate political views, which means people tend to feel strongly about their political views but don’t really care whether they are factually correct.
I definitely agree with this quote. A lot of people are influenced with the people around them, especially if they are registered in a political party. Political parties have different opinions on certain topics, which gives a lot of insight to their people. But then sometimes these opinions are inaccurate, but are still believed to be right by their members.