I sympathize with the OP and the many genuine concerns raised by this post, and I think most are justified.
But on this (though Robert clarified he meant no ethnic put-down, and I fully believe him, I had written this earlier in a lighthearted mood):
The signer's name was clearly from somewhere in South Asia.
The name couldn't have been Sonny Mehta or David Davidar, could it? Sonny, as the President of Knopf, sometimes gets to decide which Nobel Prizewinners Knopf will publish or won't and, David, ex-President of Penguin Canada, is too rich to need the job (and has a nice new job).
Couldn't have been Ralph Nazareth or David Timothy, both 100% South Asians, whose skin color is somewhere between brown and black? Ralph is a senior Professor of English at Nassau Community College, and writes English prose and poetry that would put Robert Ludlum to shame; I sometimes write to him when I need a grammatical question clarified; he probably earns over $70k a year and doesn't need the job. David works in a Bangalore publishing NGO at a senior level.
Couldn't have been Sonia Gandhi, could it? Though she was born in Italy, she rules India's 1.2 billion people, and couldn't possibly have the time to moonlight for Amazon even if she did need the extra cash.
Couldn't have been Richard Crasta, could it? That's me, and though I am the only amongst this otherwise illustrious South Asian bunch who needs the cash, I doubt I would pass an entrance test for Amazon staff.
And though I do make a few grammatical mistakes (using 92% American English, 5% British English, and 2% Indian English in my writing), I happened to teach the natives of Long Island (not the original ones, who are dead, but the descendants of the Europeans who took their land) English Composition for two semesters. Their English was had many more grammatical mistakes than mine, and it's of course quite possible that a handful of them couldn't get jobs, decided to become Hare Krishnas, and changed their names to South Asian ones.
But I admit my accent is funny. It's because of all that tandoori goat stuck in my teeth and because of all that low-fat camel milk that I drink along with my bourbon.
Richard
(P.S. All in good humor; I am not taking this issue all that seriously any more, though I did in a couple of my books. Or, as we all sing in our funny accents:
But it's all rightu Jacku,
Inna factu itsa gassu!)