"Those who actively encourage or promote homosexual acts or such activity within a homosexual lifestyle formally cooperate in a grave evil and, if they do so knowingly and willingly, are guilty of mortal sin. They have broken communion with the church and are prohibited from receiving holy Communion until they have had a conversion of heart, expressed sorrow for their action and received sacramental absolution from a priest." - Archbishop Nienstedt of Minneapolis, St. Paul, in Catholic Spirit Article, "Four points on the church's teaching about homosexuality In God's Good Time"
"He's saying that parents, family members, and members of faith communities who affirm and support their LGBT children, friends, and fellow parishioners in forming loving and committed relationships, and in living healthy and authentic lives, are "cooperating in a grave evil" and are "guilty of a mortal sin." Furthermore, they've separated themselves from the church and are not to receive Communion!"