Over the course of the past few years, we have noticed that creationism has been pushed as pseudo-science, but few people consider it's danger as pseudo-history.
You see history of any kind defines a people, gives them an origin. It is the study of the past, focused on human activity and leading up to the present day. More precisely, history is the continuous, systematic narrative and research of past events as relating to the human race.
For people like the creationist, people who have history and more importantly links to a past in which Christianity wasn't in charge, is rather inconvenient, as it raises many questions about the past and the true origins of man.
According to scientists, our humble beginnings as homo sapien, started around 200,000 BP in the Paleolithic era. According to the creationist who believes that the earth is only 6,000 years old, it's claim denies the history of thousands of cultures that came and went, for example, England's beaker people, or even the migrations of the First People from Asia to the new world.
It denies the Greeks and Roman empire, the Aztec, the Incas, the Indu culture and Chinese cultures. It denies many people their history and what shaped them as a race, a creed right down to the individual.
You really want to stop someone in their tracks, you deny them their identity as a Human being. And that starts back in denying them their cultural identity. Why do you think dying cultures on this planet fight tooth and nail to preserve their roots?
It shapes them, it defines them, and makes them who they are. History takes a great part in it.
And so, for the Evangelical movement, known for their aggressive proselytizing, part of their success is by denying the identity of a person and slowly attempting to replace it with the Evangelical Christian world-view.
And Creationism, is a nice way to do it. Only acknowledge the judeo-christian pantheon and "history". Bring the "Scientific" evidence, in a Orwellian Ingsoc fashion, rewriting history when needed or denying past transgressions in the course of history (crusades anyone?) as "True Christians do not do that" (another convenient form of historical revisionism).
Such revisions are meant to make it seem that they are indeed "Good people", while encouraging the evangelical double-think, loving thy neighbor while hating their differences, claiming the truth all the while they lie consistently in order to maintain the existence of a myth, and claiming to serve a prince of peace, while getting in conflict with right about anyone who's not one of their own.
The truth isn't pretty, I will show you the ugly.