Modifying Newton's First Law of Motion

I think it's worse than stating a falsehood.
He simply doesn't understand the length compression as-observed.
He is totally not grasping the relativity of frames of reference.

Hansda: You are standing on Earth, minding your own business. I fly by Earth at .9c.
I observe you as compressed by 50%. (This is experimentally verified.)

Tell me, does my flying by you 200 miles up cause you to experience a compressive force, shrinking you to half your width in the direction of my travel?
If you were lying in bed and didn't see me fly by, would you suddenly wake up in excruciating pain because you're being squished to only 2.75 feet tall?
You are beating a dead horse - the chance of breaking through to him is between a zero chance and no chance.