What if death is a demon? ?

I think Satan is the grim reaper. I pray he doesn't drag me to hell.

After death, three days you here.

From third till ninth day of death, you're shown heaven and hell.

Then you're accused of sins on 20 levels by demons in the sky; you have two lawyers (angels/saints).

Then you meet Jesus; then temporary hell/heaven.

After Final Judgement, it'll be permanent heaven/hell.

If last descendant rejects mark of the beast, then his/her direct ancestors go to permanent heaven.

How to reject it? By hiding within a small (10-15people according to saint Seraphim of Sarov) group. Burn documents because they're from Satan. No electronics so that you won't be tracked; forgive me.

Demons are pre xtian pagan Gods and Godesses 

According to Marvel comics, Death is Eternity's daughter (or sister?). And Thanos and Deadpool both are in love with her. Btw, Thanos is evil as hell in the comics and is actually crazy. He seems mature in the movies compared to the comics.