from what i've been able to make out from conversations with a local bagel maker (he doesn't speak much english, and i don't know any arabic), the bagels are risen twice first, then boiled to create the crust, then baked.
so, i would guess most if not all of the yeast is killed when boiling.
The past is gone it's all been said.
So here's to what the future brings,
I know tomorrow you'll find better things