PATCHOGUE, N.Y. — Snowflake parties have been multiplying, winter light festivals have been abounding, and holiday concerts have filled school halls with joyous tones.But Christians are saying, “Enough with the political correctness run amok. We want our Christmas back!” Consider: When Patchogue Village on Long Island, N.Y., renamed its Christmas boat parade a “holiday” event, Fireworks by Grucci dropped its $5,000 donation. Three thousand supportive calls, e-mails and letters poured into the company. Philip Butler, the company’s vice president, even received e-mail thanks from a U.S. Army colonel in Iraq.When the American Humanist Association, a Washington, D.C.-based atheist group, launched...