GRAND BLANC TOWNSHIP, Mich. — The man who opened fire in a Michigan church and killed four people while setting it ablaze long harbored hatred toward the Church of Jesus Christ of Latter-day Saints, according to longtime friends, and told a stranger who showed up at his door days before that attack that Mormons were the “antichrist.” The suspect, identified as 40-year-old Thomas Jacob Sanford , began making those sentiments known years ago following his return from Utah where he dated but later