We were 'blissfully ignorant''of' the problems that had occurred.
She was 'ignorant' about the dangers of the drug.
They were 'ignorant' [='unaware'] 'of' the facts.
(..) The kid said he'd kill him and he did! Do you really think the boy'd shout it out so the whole neighbourhood could hear? - He's much too bright for that. - Bright? He's a common, ignorant slob. He don't even speak good English. He doesn't even speak good English. Mr Foreman, I'd like to - You what? (..)1957 12 Angry Men
(..) to believe this kid, knowing what he is. I've lived among them all my life. You can't believe a word they say. You know that. I mean, they're born liars. - Only an ignorant man can believe that. - Now, listen... Do you think you were born with a monopoly on the truth? Certain things should be (..)1957 12 Angry Men