The meme is the armchair sociology from wingnuts who wring their hands and rend their garments before regretfully concluding that black people are culturally prone to violence, which is simply the au current way to say inherently prone to violence. National Review and Redstate are using the same narrative as those comments on the Wilson contribution site, just cleaned up for Sunday Talk Show consumption. It taps the same root.
Crime is about economic opportunity. When legal means of opportunity are denied, people are forced to other means. That's Peter Blau / Howard Becker 101. Every underclass in US history has had a quote culture of violence unquote, because it isn't the culture, it's the opportunity. Among the people who have been previously branded as being in some way exceptional in their cultural resistance to responsibility and self-harming in the pursuit of the American dream: the Irish ("drunken"), Italians ("unrestrained Latin blood"), Mexicans ("shiftless"), and Chinese (um... "inscrutable"?). The Echo Chamber couldn't get away with peddling any of those characterizations anymore (well, maybe the Mexicans... but apparently these days they prefer "diseased"), but we still get "black mob culture," "absence of black fathers," "black de-emphasis of education," etc. That's the meme.
If you reversed the history of racism and the present state of economic opportunity of whites and blacks in the US, the results would be exactly the same with the races reversed. Race means something here only in the sense that it's a marker used by both sides to self-identify, but the actual content of race -- who's black and who's white -- is utterly arbitrary.
And that's why a Modest Proposal like send-up of the language being used is appropriate and highly effective.