How does gravity pull object down to the earth at the same rate and ignore the fact that bodies have different inertial resistences to being moved through space?
It's easier to roll a marble versus a bowling ball, for example. All bodies exhibit internal resistences when they are moved through space.
So what you dont understand is why objects of different mass have the same acceleration under gravity. The thing is gravity acts on an atomic level which means it pulls every atom down towards the center of the earth, every atom in the object gets acted on by gravity equally. This is why the difference in mass does not effect the acceleration due to gtavity. To put it simply, (if air resistance is negligble) if you drop an 2 object of equal mass of lets say 1 kg, they would fall with the same acceleration, now if you have 3 object of mass 1 kg and drop them all at the same time, again they would all fall with the same acceleration. Now if merge 10 of the 1 kg mass together, they would fall with the same acceleration as the 1 kg mass because all 10 of the 1 kg mass gets the same acceleration. In terms of math, (acceleration due to gravity is 10 to keep it simple) if you drop a 1 kg mass using F=M A F=1×10 F=10 so the weight is 10N for every kg, if the mass is 10kg F=10×10 = 100N, the weight is 100N, which is equal to the weight of 10 1kg weight. Hence I claim that gravity act on every object equally.