PHILLIP PULLELLA THE Vatican has decreed that priests cannot bless same-sex unions and that such blessings are not valid, in a ruling that greatly disappointed gay Catholics who had hoped their Church was becoming more welcoming under Pope Francis. In some countries, such as the United States and Germany, parishes and ministers have begun blessing same-sex unions in lieu of marriage, and there have been calls for bishops to de facto institutionalise these. But conservatives in the 1.3 billion-member Church have expressed alarm over these practices, particularly those in Germany where at least two bishops, including Cardinal Reinhard Marx of…