Backlog Touch of Moonglove doesn't trigger 2 life effect

[AncientGear]

I use touch of moonglove on my Bloodfire Dwarf, and once the creature obrains the Moonglove effect, I use Dwarf's effect. I sacrifice it making a deathouch damage on each creature on the battlefield, making 1 dmg each. They all die, but players don't lose 2 life for each creature killed by this effect.