Who could have guessed a schizophrenic with unfettered access to high-powered firearms and a massive dose of right-wing idiocy would cause such things as a mass shooting and a night of terror?
schizophrenic
access to high-powered firearms
massive dose of right-wing idiocy
Two of those things dramatically increase the chance of violence, and schizophrenia ain't one of them. Let's not perpetuate myths that mentally ill people are inherently prone to violence because they're not.
Comorbidity with substance abuse is the most important clinical indicator of increased aggressive behaviors and crime rates in patients with schizophrenia. Genetic studies have proposed that polymorphisms in the promoter region of the serotonin transporter gene and in the catechol-O-methyltransferase gene are related to aggression. Neuroimaging studies have suggested that fronto-limbic dysfunction may be related to aggression or violence.
It is related... Those with Schizophrenia are more prone to related issues that affect them genetically. This is not me saying that all Schizophrenic people are violent... but there are studies that suggest there is a related pattern. We've also gotten better medication over the years to cut back a lot on it.
Comorbidity with substance abuse is the most important clinical indicator of increased aggressive behaviors and crime rates in patients with schizophrenia.
Somehow I think you missed the most important sentence in that paragraph.
So if there's a normal rate of substance abuse in any given population... Let's for shits and giggles say that 1% of all people have some form of substance abuse problems...
But schizophrenic people are more susceptible to it substance abuse increasing their volatility/making them more violent than the normal population of substance abusers... How is this not a schizophrenic-based problem? It should be even more predominant because the population of Schizophrenic people vs normal population that needs to be medicated (unlike the general population at large)...
Edit: for clarity
Schizophrenic population has greater rates of substance use due to medications. Schizophrenic populations are less favorable by genetics to react to medications.
These two facts (supported by previous study linked), mean that the population is more risky for the behavior. Regardless is the Schizophrenia itself not being the direct problem... it's certainly a meaningful contributor.