yes, and part of keeping an open mind is recognizing that correlation is not causation. Correlation indicates that there is a causal relationship somewhere, but it may be that A causes B, or B causes A, or C causes A and B. In this case, mental illness (C) is the cause of taking medications to treat mental illness (A) and also the cause of murderous rampages (B).
Which, frankly, is completely and totally obvious when you state it that way.
This dangerously misleading article, however, tries very hard to imply that A causes B.