ST. PAUL, Minn. — A Roman Catholic priest denied communion to more than 100 people yesterday, saying they could not receive the sacrament because they wore rainbow-colored sashes to church to show support for gay Catholics. Before offering communion, the Rev. Michael Sklucazek told the congregation at the Cathedral of St. Paul that anyone wearing a sash could come forward for a blessing but would not receive bread and wine. The sash wearers, who were either gay or friends and family of gays, remained standing with their empty hands cupped in the posture that indicates “I am ready to receive…