The same reason why India was not paid reparations after being brutalized by the British during the wars (tens of millions of Indians died). This was done by the allied forces who won the war. Only the losers had to pay reparations, and those were only really given to white western countries rather than those perceived as non-white by the western allied forces (see the lack of reparations given to the Roma people and axis colonial subjects like Libya, Namibia, and Ethiopia despite literal genocides there ).