The difference is skeptics' beliefs are open to change when new evidence emerges. A Christian skeptic has a whole set of beliefs excluded from any skeptical analysis.
YOU DON'T KNOW THAT! Different people can come to different conclusions even when using the same data. Ultimately, we have to accept and respect that even if we think the other fellow is wrong.
Besides, that's not really what you are saying. Instead, what you are really stating is that
you can't
personally comprehend how someone can be a Christian and a skeptic. Subtle, but
fundamental difference.
Confusing the two turns "skepticism" into an ideology, a set of beliefs that one must adhere to in order to be a "proper" member of the group. Do that and all you end up with is dueling ideologies. Others will turn against skepticism because they will see it (rightly in this particular case) as just one group insisting that it's version of the truth is better than theirs. The fact that it (probably) actually is will be completely beside the point.
Worse, it encourages skeptics to treat their beliefs as a sort of
fait accompli where it is so "obvious" that their views are correct why should they really examine them? This is what every other group with a closely held belief system does. We shouldn't be so arrogant as to assume that somehow being a "skeptic" makes us immune to this common human failing.
Instead, we should have faith in the
methodology of skepticism. Teach that and then trust that people will come to the best conclusion. Concentrate on good critical thinking. Teach the method.
If "skepticism" becomes nothing more than a list of conclusions that any "good" skeptic "must" believe then we've already lost.