Articles like this annoy me. A person's political views are part of their personality, it's not something they "chose." [0] It's especially ironic to read an article with this flaw written by a person who literally just graduated with a degree in Psychology from an ivy league institution.
Being a foster child did not make him conservative. He was born that way. The tone of the article is that he's very angry that he's "different" and he feels that people look down on him for it (by calling him a victim). Which is understandable. But I think this article serves as therapy for the author. It's certainly not saying anything new or insightful.
[0] https://en.wikipedia.org/wiki/Conscientiousness#Political_at...
As an aside, the fact that Conscientiousness negatively correlates with intelligence also explains why only 12% of the student body is conservative. He's a rare combination.