Village Idiot : Your chart only included Turkey amongst Muslim nations and there was a big difference between the USA, 40% pro-evolution, and Turkey at 25%. Also, your title's mention of American Christians implies that most who identify themselves as such, about 85% of its population, hold on to that belief. It's fundamentalist Christians who are the focus, not liberal Christians and moderates who tend to believe in evolution and outnumber the Fundamentalists.
Of course, the USA lags behind the secular minded Europeans because of its having a larger fundamentalist Christian presence but it is not fair to compare them to Muslim nations.
Unfortunately, not 'my chart' V.I. but 'the chart.' I would love to have the facilities to produce such charts)
Nonetheless, you are quite right. Both 'the chart' and my comments contained generalisations. The fact that Christianity is hopelessly divided on this (and, other topics) is a point I made in Shadow's thread, "What are the biggest holes in Evolution." This is the point I made, emphasising that relatively few Christians (a minority) refute evolution.
Even more basic is that the question can be reduced to this, "How did humans come to exist on this planet?"
Faith based Christian religions, a rather small minority of the 2.2 billion professed Christians* in the world insist that it is by special creation. If you ask the same questions that you suggest should be asked about evolutionary scientists, what answers do you think that you will get?
I fail to see why it is 'unfair' to compare fundamentalist Christians to Muslim nations. Though of course, to speak of Muslims as a monolithic, homogenous bloc is also a generalisation. Not all Muslims are the same, not all are fanatical. Neither, are all Christians peace loving, are they? The point I wanted to make in the thread's title was that the beliefs of both groups on the topic of evolution are similar.
But I accept your judgement that it may have been better to define the term, 'American Christians' more specifically to fundamentalist American Christians.