The term martyr (Greek μάρτυς martys “witness”) is most commonly used today to describe an individual who sacrifices their life (or personal freedom) in order to further a cause or belief for many.
So, a killed solider is a martyr, but a person dying from an explosion is NOT a martyr, that person is a victim!!!!
Enough with over using that word!
People who died randomly from a terrorist act, did not choose to be there, they did not pick that car and walked next to it because they knew it was a bomb. They are victims.