> large part of the effort that dealt this injustice to him was facilitated by the fact that the vast majority of people willfully turn a blind eye when the same thing or worse happens to people are not of their ilk

Reminds me of Marx's 1870 letter to Sigfrid Meyer and August Vogt:

  Every industrial & commercial centre in England now possesses a working class divided into two hostile camps ... The ordinary English worker hates the Irish worker as a competitor who lowers his standard of life ... regards himself as a member of the ruling nation & consequently becomes a tool of the English [ruling class] against Ireland, thus strengthening their domination [over his own self]. He cherishes religious, social, & national prejudices against the Irish worker ...

  The Irishman ... sees in the English worker both the accomplice and the stupid tool of the English rulers in Ireland.
  
  This antagonism is artificially kept alive & intensified by the press, the pulpit, the comic papers, in short, by all the means at the disposal of the ruling classes. This antagonism is the secret of the impotence of the English working class, despite its organisation. It is the secret by which the capitalist class maintains its power.

  ... The antagonism between Englishmen & Irishmen ... enables the governments of [the US & England], whenever they think fit, to break the edge off the social conflict by their mutual bullying, and, in case of need, by war between the two countries.