Why do bishops (catholic) in some dioceses say that the Pope is outdated and ignoring scripture by refusing same-sex couples the sacrament of marriage, i.e. making their union holy. (Example). They believe that blessing these couples is supported by scripture, but I am not sure where they find support for that claim. One priest in my city says God is "I am" not "I was", and as our understanding develops we ought to see that we should extend our blessings to even "non-traditional" marriages.
Since it's not just one or two priests accusing the Pope, but rather many bishops including the president of the bishops' conference in Germany, I don't think this can easily be dismissed as a heretical priest or something like that. I would therefore like to know why they believe it is justified and in line with Scripture to extend the sacrament of marriage to homosexual marriages.