That Vatican II hit the Church at the same time as the aggressive counter-culture in America and the social convulsions of the 1960s was significant. The changes in manners and mores, in fashion, in sexual morality - all of this had an impact on the Church as well. It is similar to what happened to colleges and universities, they were captured by a liberal mentality which lasts to this day. The Church, universities, the Democratic Party, the entertainment industry, the media, all of these institutions embodied and instutionalized radical liberal culture in ways which have lasted to the present day even though many Americans reject the mentality and ideology. Study the counter-culture and the social processes and transformations of American culture during the 1960s and you find a lot of things which changed the Church above and beyond the documents of the council.
Yes, but do you believe this was coincidental or intentional? Having researched the origin of Vatican II, Pope John XXIII would have us believe that "it was completely unexpected, like a flash of heavenly light". Whereas, Paul VI observed the "smoke of satan" had entered the vestibule.
As catholics, we believe that the Pope is "divinely" inspired; when else in the course of history, has the church undergone such a dramatic change?