It was about abortion, gun safety and Israel. It was always about immigration. But in the end, after two months of furious campaigning and fundraising and unique national attention fixed on a sliver of Queens and swaths of Long Island, the frantic special election battle for the House seat vacated by George Santos may have boiled down to another element that defies easy policy categorization. At the ballot box, voters in New York’s 3rd Congressional District — an area that was seen as turning increasingly red over the years — decided to pick a seasoned veteran over a mostly unknown newcomer. T…