Actually, homophobia can be classified as a mental illness, by virtue of (unlike other phobias, or irrational fears) the percentage of cases in which it triggers anti-social or criminal behavior. Not a high percentage of individuals are afflicted with this distorted perception of reality, only relative to other phobias.
As for other phobias – eg of high places, tight spaces, public speaking – these more properly fall under the domain of personality disorders, albeit minor ones. More serious pds include Narcissism and Histrionics (the flip side of Narcissism), covered in any basic Abnormal Psych. textbook.
Mental disabilities are another matter entirely. Depression, manic depression (bipolar), and schizophrenia, well-known examples, comprise this category, arising from a chemical disorder in the brain, as opposed to the personality disorders, which develop through environmental influences.
When I pursued a career in education, the college I attended offered no such degree. Instead it mandated a degree in either psychology or social work (I chose the latter) in addition to classes culminating in a teaching certificate. Whichever route one took required a substantial number of psychology and counseling courses.
When I write on issues, especially in response to commentators on the issues, I try to address the subtext, roughly translated as reading between the lines. On this website that pertains to participants in the discussion as well as the original speaker, or subject of the post. I understand this is potentially troubling for those who may not be consciously aware of what they’re thinking or saying beyond the words themselves.
As for Walmart, there are two in my area. As a matter of principle, I never patronize either of them. Much less would I work for one.
This is my final contribution to this post. Have fun finding me under my new pseudonym to future posts.