i think it means either way if it is false it is of no importance and if true it is important,and it can be fully important because it cannot be completley proven true. So if there is not enough eveidence to be proven true not everyone can believe in it.
the french girl is a woman who encourages elie to remain strong and she is jewish, nice, kind & thouughtful & years later, (elie) he runs into her on a metro in paris.
