Clinton, much like Obama, appears to be openly hostile to Christians. Even worse, she has hinted openly that Christian beliefs and practices are antithetical to her world and legislative view.
Christians don't need a perfect Christian role model in the White House, but we do need someone who's not actively politicking against us.
Trump showed respect for people of all faiths, and he earned the support of many influential religious leaders. I think itbalso helped that he was humble and never tried to act like a religious leader.