That may be what the majority does, but history is filled with people willing to die for their beliefs. From the Maccabees against Assyrian Greeks to Falun Gong against modern China, martyrdom is not all that historically unusual. And the beliefs supporting martyrdom are so blatantly contradictory that they can't all be right.

Moreover, martyrdom is not particularly Christian. For example, Rabbi Akiva was a great Jewish martyr.