User blog comment:ImperiexSeed/Michael or Death, who's stronger?/@comment-92.23.252.19-20120428193524/@comment-92.23.252.19-20120428194402

I don't know, but the most likely reasons are because the only weapon they think can kill him is the scythe or because Death has convinced Dean he is this unstoppable God killer. Also, Dean has needed Death's help in the last two episodes he was in.