Imagine the following scenario (which I think is fairly common) and tell me whether you think the imaginary person described is mentally ill:
An autistic person feels:
Sad/depressed because people exclude him or avoid him because he is different.
Anxious because people are overly critical of his differences.
Angry because people treat him unfairly because he is different.
This person moves to another neighborhood and feels:
Happy (no longer sad/depressed, anxious, or angry) because people like him, respect him, and treat him fairly despite being different.
His sadness/depression, anxiety, and anger return when he moves back to the intolerant neighborhood. A psychiatrist diagnoses him with depression, anxiety disorder, and an anger disorder. His symptoms go away when he visits friends in his previous neighborhood who accepted him and come back when he returns home to the neighborhood where no one accepts him.
An autistic person feels:
Sad/depressed because people exclude him or avoid him because he is different.
Anxious because people are overly critical of his differences.
Angry because people treat him unfairly because he is different.
This person moves to another neighborhood and feels:
Happy (no longer sad/depressed, anxious, or angry) because people like him, respect him, and treat him fairly despite being different.
His sadness/depression, anxiety, and anger return when he moves back to the intolerant neighborhood. A psychiatrist diagnoses him with depression, anxiety disorder, and an anger disorder. His symptoms go away when he visits friends in his previous neighborhood who accepted him and come back when he returns home to the neighborhood where no one accepts him.