Source: The Wall Street Journal Religious groups that oppose gay unions re-emphasize teachings, fine-tune their message By TAMARA AUDI Arguments over same-sex marriage played out in the U.S. Supreme Courton Tuesday, but many religious groups opposed to gay marriage aren’t waiting for a ruling. A court ruling expected two months from now could sanction same-sex marriage nationwide. In anticipation, some congregations and religious advocacy groups are re-emphasizing their teachings on marriage, fine-tuning their approach to gays and lesbians and bracing for legal battles and public criticism. “The outcome of this decision will shape the landscape of the church’s ministry in the…