There could be some valid public safety conclusions to be drawn from looking at racial and economic factors in cyclist crashes, but this article doesn't come close to demonstrating any.
And a letter to the editor by Jim Wilson of Warrenton expressed a similar sentiment.
It is fair to assume that workers who must bicycle to and from work in the dark are from a lower economic strata, but to link cycling deaths to ethnicity is absurd. Were any statistics kept describing the cultural identities of the vehicle drivers who caused these deaths? Perhaps a majority were white Anglo-Saxon Protestants. Equally absurd.
Update: As noted in the comments Ashley Halsey responded to Alpert's post. He sounds pretty reasonable (and I already knew he was a cyclist). I'm not going to excerpt the comment, as you kind of need to read the whole thing.