I'm worried, but not freaking out. If, and thats a purely hypothetical if, they should succeed and have power in every corner of the world, their lazy and corrupt governments would collapse on themselves and the right leaders would take their places, exterminating any hint of islam in their corridors. Perhaps that is the renewal the Hindus believe will happen; Islam consumes the world and then becomes extinguished, and we rebuild from nothing.
But, G-d willing, that will not be the case. We can extinguish the embers before we have a forest fire on our hands.