That’s not victim blaming, bud. To the contrary.
Webster’s, definition 2:
martyr: a person who sacrifices something of great value and especially life itself for the sake of principle
That leaves aside the religious overtones of the first definition.
If you are treating deaths due to terror attack as anything other than tragedy, there is something deeply wrong with your society.
To suggest that it is in any way voluntary, or intentional for the sake of religion, is disgusting.
It depends.
Were they killed in the line of duty? Did they make a choice that is at bare minimum well-intentioned? Or did they just happen to be there and died by bad luck?
Firefighter dies trying to save someone from a burning building? Sure, okay. Dies in a vehicle crash while responding? Maybe.
Dies by someone else’s actions and is never aware of any possibility of a choice? That’s not any sacrifice, let alone the “ultimate” sacrifice.