The poet Derek Walcott had a mutually contentious relationship with this author, who was also a Nobel laureate who’d grown up on a Caribbean island. Who was it?

From a 1982 article about Walcott by James Atlas in The Times Magazine:

But by the mid-1970’s, he had come to resent Naipaul’s increasingly vehement appraisals of Trinidad, in particular his profile of a Black revolutionary whose movement ended when he committed a series of ghastly murders of his disciples. “You spit on your people / your people applaud,” begins a poem addressed to “the exiled novelists”; and in his newest collection, Walcott’s nemesis has become “V.S. Nightfall.” “There was a time when Naipaul’s satire was salutary,” he says. “What it’s gotten to now is a manic fury controlled by a style that is becoming emptier with every book; the fury is dehydrating the style.”