Although Malato was not in favor of racistes or racisme as such, regarding them as constituting an intermediate stage on the path from the destruction of the existing empires to his ideal of global anarchy, his use of those words back in the late 19th century was clearly not polemical but based on their objective content. Malato saw a tendency in Europe toward reorganizing political boundaries and allegiances along racial (or ethnic) lines, and he called this tendency racism. Note also that Malato specifically refers to Pan-Slavism as a form of racism, thus anticipating Trotsky's application of the word.
First English Usage
A piece for National Public Radio (Gene Demby, "The Ugly, Fascinating History of the Word 'Racism'," 6 January 2014) cites the Oxford English Dictionary to the effect that the first use of the word racism (in English) was by Richard Pratt in 1902, five years after Malato's use of raciste and racisme in French.
Pratt was a Baptist religious zealot who was particularly devoted to stamping out the identities of various North American tribes through assimilation. NPR's author for some reason finds it paradoxical that somebody who condemns racism would be trying to stamp out the racial as well as the specific ethnic identities of Cheyenne, Choctaw, or Muscogee, when in fact it is perfectly consistent. Racism in its proper meaning, as we see with Charles Malato and the Occitanian separatists a century ago (contemporary with Pratt), means concern for one's race (however that race is defined), and an impulse to preserve that race, and, in accord with that, organization along racial lines. To condemn racism as such is ultimately to condemn the preservation of any race, with the mongrelization of all mankind, explicitly hoped by some, being the predictable long-term result. Deliberate destruction of races through assimilation and mixture, as advanced -- although in a more direct and obvious manner than we usually see -- by Richard Henry Pratt with his Carlisle Indian Industrial School, is the ultimate implication of anti-racism. It is remarkable that anyone pretends to be confused about this.