Yes, this means racism is working and we need to double down on it. If they studied actual racists they would find that brain health and overall quality of life are improved by racism.
Causation and correlation as usual. All of their test subjects probably live among niggers, it's how normies turn racist in the first place. And living among niggers causes stress. Stress causes faster aging.
To solve the root cause we need to get rid of niggers, kikes and other trash that causes unnecessary stress. Make the cities beautiful again, all the little details matters.
Sorry to be the guy who impotently imagines if the situation was reversed, but if the results showed the opposite the phrasing would certainly become something like "study shows that agreeable people have more mature brains"
I imagine realizing how fucked the country and your countrymen are is stressful. Stress is bad for you in terms of aging. That would be my guess, if it is real data at all
The jokes write themselves