Every so many years I have to re-read a summary of Dignitatis Humanae, and how it does or doesn't differ from earlier ideas about religious freedom from the time of Christendom (original meaning), but even then end up with a fairly hazy feeling about the whole thing.
At any rate, the expressed preference in Vatican II for Democratic Liberalism, knowing those two words are not used exactly as they typically would be on this forum, but kinda/sorta are, continues to make me uncomfortable.
Me, too.
There's some stuff in the Vatican II documents that I think is silly, including the opinion that "modern man" is somehow improved over the version we've always had. However, that is a statement of opinion, while the document of freedom of conscience is a statement of doctrine. If one believes the Council promulgated a doctrine - a statement on faith and morals, not pastoral practicalities - that is WRONG, that's a big problem.
I don't remember where I read that this was the sticking point for the SSPX, so I can't check it. I may be wrong.