This was my post. Name one Modernist principle that was actually taught at Vatican II. Did Vatican II teach that the meaning of doctrine changes over time? Did Vatican II teach evolution? Did Vatican II undermine the historicity of Sacred Scripture?
Because modernism means doctrine changes with the times, they used that excuse to change everything, so of course I see modernism as the main driver of V2.
Then again it was all probably just a communist plot disguised as "Modernism" to sell it easier.
Either way, I don't see EENS as the one and only cause. That's just ridiculous.
That's like attributing Communism to a denial of EENS.