I think part of it is down to the current state of the world. Some people don’t like being told what to do, even if it’s sensible and ultimately brings about a good result for everyone. They entrench themselves in a position and will ignore any evidence that suggests they should admit their error and change stance. They further reinforce their ideas through ‘research’ online, which funnily enough always ends up proving they are correct. These people are short-sighted, belligerent, bloody-minded and selfish.