martyrdom isn't instrumental to christian salvation the same way that it is to marxist salvation.

the only man who needed killing in christianity was jesus — if you are a martyr this is just so much additional glory and doesn't actually advance the Kingdom.

marxism demands much more blood than that to pay for the sins of the world, and it probably includes yours. killing class enemies, or getting killed by them, is a glorious dialectic push towards the Workers State.