A city worker was under fire last night for penning an essay that uses ethnic slurs to describe Polish-Americans and calls their Brooklyn enclave in Greenpoint "even uglier than the morons who work there." David Langlieb, a 23-year-old Parks Department project manager, defended his work as "satire." "I live in Greenpoint, I'm half Polish, I have nothing but love and fondness for the Polish community," he said. "If you take what's there out of context, of course it's incredibly offensive." But Frank Milewski of the Polish-American Congress, who read Langlieb's entire essay, called it an "an out-and-out insult" and was...