"Martyrdom for Christ grants the ultimate reward."
The ultimate reward in heaven, yes, not the access to heaven.
That is an illogical statement - there are no degrees in heaven. One heaven under one godhead.
You make it sound that the martyrs will get a luxury condo in heaven.
The reward is the remission of sins.
That as been orthodox dogma for 2,000 years - May I ask what Protestant sect denies martyrdom for Christ leads to salvation? I assumed even Protestants said as much. But you know what happens when you assume.