This is from Psychology Today.
Note that it's also been shown..by psychologists..that psychologists are mostly liberal in orientation and are quite willing to discriminate against conservative colleagues. So the following quote should be toned down a lot "in the real world". Defensive reactions to world events can be healthy too, sometimes.
"In 1969, Berkeley professors Jack and Jeanne Block embarked on a study of childhood personality, asking nursery school teachers to rate children's temperaments. They weren't even thinking about political orientation.
Twenty years later, they decided to compare the subjects' childhood personalities with their political preferences as adults. They found arresting patterns. As kids, liberals had developed close relationships with peers and were rated by their teachers as self-reliant, energetic, impulsive, and resilient. People who were conservative at age 23 had been described by their teachers as easily victimized, easily offended, indecisive, fearful, rigid, inhibited, and vulnerable at age 3. The reason for the difference, the Blocks hypothesized, was that insecure kids most needed the reassurance of tradition and authority, and they found it in conservative politics. "
So, possible liberal bias aside, and that this is only showing a trend and that not all, or even most liberals or conservatives follow this path, just the more extreme personalities tend to, still shows some truth to the 2) statement.
You can, and probably should, rewrite some of that to be more fair, like replacing "structured" for "rigid" on the conservative side, or "ADHD" for "energetic and impulsive" on the liberal side.
As an aside, there are plenty of science deniers on the left, too. Look at fracking, GMO foods, safety of nuclear power, and some of the alleged advantages of organic foods.
Everyone wears different coloured glasses. We can't help but see using bias.