Foolish men (anoētoi). Literally without sense (nous), not understanding. Common word.
Slow of heart (bradeis tēi kardiāi). Slow in heart (locative case). Old word for one dull, slow to comprehend or to act.
All that (pāsin hois). Relative attracted from the accusative ha to the case of the antecedent pāsin (dative). They could only understand part of the prophecies, not all.