Not true. Performing the ball rolling experiment by Galileo would show that the ball always tries to achieve a final height that is equal to its initial height, roughly demonstrating a conservation of energy. And probably by oiling the surface the ball rolled on, he and Newton were able to show friction as a force that slowed down the ball, so that in its absence, the previously demonstrated conservation of energy would require the ball to move for all time.
No contradictions at all. Galileo and Newton merely used inductive reasoning to arrive at the law of inertia.
On the other hand, Einstein's SR proposed a totally absurd and illogical notion that velocity of light can be an absolute constant for all observers, regardless of their velocities through space. This is trivially proven false by demonstrating that motion exists. Or more elegantly, like MM, that one ray of light cannot be everywhere at once.