Whenever that was, did they say “against him”?
Taking refuge in tedious word parsing is weak and unpersuasive. Though some are still loathe to admit it, Bergoglio has manifestly crossed the line. The emperor has no clothes.
They don’t need to. The whole concept of a “dubia” is, literally, casting “doubt” on the orthodoxy of a teaching or policy. For Cardinals to cast doubt on some policy or pronouncement of the Pope is to imply that he has said or done something that they doubt is in accordance with the Deposit of Faith.