Shlomo Sand said this quote

The construction of a new body of knowledge always bears direct connection to the ideology in which it operates. Historical insights that diverge from the narrative laid down at the inception of the nation can be accepted only when consternation about their implications is abated. This can happen when the current collective identity begins to be taken for granted and ceases to be something anxiously and nostalgically clings to a mythical past, when identity becomes the basis for living and not its purpose - that is when historiographic change can take place.