The second Vatican council was approved by the world’s bishops at the time, it was and is a valid council, end of story.
Well that means you worship the devil god of the murderous Muslims, end of story; and that you deny the dogma of Extra Ecclesiam nulla salus.
It was a valid council which put forward no solemn definitions, nothing which would meet the definition of infallibility. (Which is characteristic of the heresy of modernism- it never defines, only proposes- even if what it proposes is contradictory to the established Faith)
We are required to give assent to our superiors- but not if what they are commanding go’s against past Church Teaching or endangers the Faith.
Your blithe dismissal does nothing to help us in the trenches fighting for our Faith and those who we are responsible for.