You think you've read drivel? You haven't read drivel until you've read this

[Galadriel55]

I very much agree with Mindil (and welcome to the Downs!). The Haradrim and Easterlings are not bad or evil or immoral, they are unknown people who by chance of fortune not known to us ended up fighting on the side of Sauron. This is in contrast to the Black Numenorians who settled in those lands, who clearly knew better and yet chose corruption over kindness. So if Tolkien were to be condemning a real world phenomenon, it would be the colonization of unknown cultures and countries, not the races themselves. But that is all unintentional extrapolation; Tolkien never had in mind to convince anyone for or against some racial view or colonization debate, his purpose was entirely elsewhere.