I'm a science teacher and living in Norway the question of Creationism is indeed a rare one, so I'm not so much asking for practical reasons as I am for reasons of principle.
And while I would not condone the ridicule of religion as such, seeing as Creationism/ID seems intent on imposing their 'theory' into science classes and comparing it to one of the best established sciences we have, is it reasonable to make fun of Creationism?
Your question and comments fascinate me. By "Creationism", do you mean simply "the belief that God created the world" or do you mean something more specific, as in "God created the world in six literal 24 hour periods."
I've heard that many folks in Europe don't believe in God. In Norway, is it really unusual to have a student that believes that God created the earth? That is incredibly hard for me to believe and so far from my way of thinking. Do a majority of people in Norway believe that it's laughable to believe that God created the world?
About 80% of Americans believe in a "Higher Power". How that correlates with a belief that that Higher Power created the universe is not clear. These 80% come from all cross sections of society, rich, poor, well educated, under educated, etc. Anyone who mocks that someone else believes that God created the world may not be as intelligent as they suppose.
There is no contradiction between true religion and true science. I can't conceive that science has or ever will prove that there is no God. A science teacher can and should present all scientific findings, facts, and theories regarding the origin of man and the universe. If such information contradicts ones religious views, the science teacher presses forward anyway. We can't hinder scientific research if we discover something that appears to contradict our spirtual views of reality. In due time all things will be understood and reconciled.
I hold to the firm belief that God created the world. Let science teachers teach science and never pretend in class that science disproves the creations of God. Quite to the contrary, it demonstartes the intelligence and majesty of God. And let no religious person sweep science under the rug in class because they think it contradicsts their religious views. Either approach strikes me as narrow minded and arrogant.