Why the suffering? For God?
Because gods were invented by primitive people and the first gods were ANYTHING that can KILL YOU. The great predator cats, whatever makes lightning and thunder, whatever causes or witholds rain, the volcano inside that nearby mountain. All those sorts of things became gods BECAUSE THEY CAN KILL YOU. So the M.O. of the people was from the very beginning: DON'T PISS OFF THOSE GODS - APPEASE THEM. How? Well, since their godhood rests in their power to kill, perhaps if we pre-empt the killing of the gods they/he/she will be appeased and not kill ALL of us, or more importantly, ME.
There's the beginning of religion and the basis for all of it ever since.