Pope Francis condemned the "very strong, organised, reactionary attitude" in the US church and said Catholic doctrine allows for change over time.
Pope Francis has blasted the “backwardness” of some conservatives in the US Catholic Church, saying they have replaced faith with ideology and that a correct understanding of Catholic doctrine allows for change over time.
Francis’ comments were an acknowledgment of the divisions in the US Catholic Church, which has been split between progressives and conservatives who long found support in the doctrinaire papacies of St John Paul II and Benedict XVI, particularly on issues of abortion and same-sex marriage.
Not everyone who considers Deuteronomy to be scripture is Christian. For example, basically any rabbi would disagree with you.
The Deuteronomic code is literally presented as instruction from Moses to Israel as a normative set of rules for israel to follow. Many of the rules in it are included in the traditional lists of the Torah's 613 commandments.
I don't know of similar commandments in the new testament, but it's had its fair share of religious leaders inciting sectarian wars, pogroms, persecution, etc. For example, Pope Paul IV wrote a decree that forced the Jews of Rome into a ghetto in 1555, prevented them from owning property or working most skilled jobs. The Spanish Inquisition primarily targeted Jews and Muslims who converted to Christianity under threat of exile.