Cardinal Gerhard Müller at a penance service in St. Peter’s Basilica on March 29, 2019. Credit: Daniel Ibáñez/CNA. Rome Newsroom, Jan 12, 2021 / 06:05 am (CNA).- The former head of the Vatican’s doctrinal office said on Sunday that today’s media environment is undermining theological truths that are the foundation of Church unity. “In the era of secular thought and the mass media, political and ideological points of view end up contaminating theological judgment — that is, the way of seeing the faith of the supernatural mission of the Church,” Cardinal Gerhard Müller wrote in an essay published online Jan. 10.