Fair objection. I thought it was obvious that the map was just a visualization and not the incontrovertible data. That would be the data from various high quality reports such as those produced by the UCR[1], BJS[2], NACJD[3], and the MAP[4].
I don't know of any non-straw arguments against my position that demographics are a dominating factor in homicide rates because of the high quality of the homicide data. Note that I say factor and not cause. The causes for these observable patterns are very much under debate. Nevertheless, corpses are hard to ignore. The paperwork almost always gets filed, so the data quality is considerably higher than for underreported crimes such as rape.
I don't know of any non-straw arguments against my position that demographics are a dominating factor in homicide rates because of the high quality of the homicide data. Note that I say factor and not cause. The causes for these observable patterns are very much under debate. Nevertheless, corpses are hard to ignore. The paperwork almost always gets filed, so the data quality is considerably higher than for underreported crimes such as rape.
[1] https://ucr.fbi.gov/
[2] https://bjs.ojp.gov/
[3] https://www.icpsr.umich.edu/web/pages/NACJD/
[4] https://www.murderdata.org/p/offenders.html