I'm surprised at you, Aragorn. Suicide is never an option for a believer, whether Israelite or Christian.
Furthermore, many Christians were martyred by crucifixion, including Simon Peter who was crucified upside down. Jesus Christ and many disciples died by crucifixion. Should they have just gathered in the upper room and slit their wrists instead of preaching the Gospel under threat of torture and death?
How much more heroic would those at Masada have been, how much more storied their legacy, if they had killed three times their number in Romans? Or twice their number?
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Good point Shogun, but they were not Christians. This was a battle for survival and a way of life. I doubt the Jews at Masada were all that concerned with setting some kind of noble and altruistic example for the Roman soldiers. They killed plenty of Roman soldiers before they took their own lives. Certainly more than anyone would have expected them too beforehand considering the strength of the opposition.
As far as suicide not being a option for the Christian at any time, you are probably right.