Holocaust is a general term, and there have been others, here are some pictures of huge piles of skulls from the Cuban Holocaust done by the Spanish in the late 1800s:
You’ve got a point there, the term is technically older and historically used in a wider sense. Looking at google Ngrams, it was barely used before the second half of the 20th century. Words change meaning and when a word is strongly associated with one event and it was barely used before that, it is safe to say that it now exclusively refers to that.
Holocaust is a general term, and there have been others, here are some pictures of huge piles of skulls from the Cuban Holocaust done by the Spanish in the late 1800s:
https://www.latinamericanstudies.org/reconcentrado.htm
You’ve got a point there, the term is technically older and historically used in a wider sense. Looking at google Ngrams, it was barely used before the second half of the 20th century. Words change meaning and when a word is strongly associated with one event and it was barely used before that, it is safe to say that it now exclusively refers to that.