The field director for Queens Councilwoman Vickie Paladino’s reelection campaign has a history of thumbing out inflammatory messages on social media, but the campaign is downplaying the vitriol and sticking by the young operative. The insensitive posts from the Paladino staffer, Mario Nicoletto, include an Instagram story he shared last month referencing a white supremacist slogan, according to screengrabs obtained by the Daily News. On Twitter, Nicoletto has shared posts from a prominent neo-Nazi. Nicoletto, a Suffolk County resident who used to work for embattled Queens/Long Island Rep. George Santos, was hired as Paladino’s field director in the past month...