"I see only one type of ecumenism: that promoted by the Council, which emphasizes respect and collaboration with false religions, placed on the same level. This is a new concept that has been imposed and is in contradiction with Tradition. In place of the “missionary” Church, the new “ecumenical” Church has appeared. The Assisi meeting consecrates this new Church, and this is enormous, scandalous. [...] If salvation is possible even without conversion to Christ in the Church, and while continuing to worship one's false gods, what meaning does mission still have? Then all religions are equal, good... If this Pope had lived at the time of the Roman persecutions of the early centuries, perhaps Christianity would have found a respectable place in the Pantheon of religions."
January 1, 1970
https://en.wikiquote.org/wiki/Marcel_Lefebvre