PORT-AU-PRINCE, Haiti — More than 1,000 people in Haiti participated Friday in a rare street demonstration to protest homosexuality and a proposal to legalize gay marriage in the Caribbean nation. The protest brought together a mix of religious groups, from Protestant to Muslim, who carried anti-gay placards and chanted songs, including one in which they threatened to burn down parliament if its members make same-sex marriage legal. A Haitian gay rights group has said it plans to submit a proposal allowing homosexuals to wed.