Do you believe that "everything is relative"?
Yes, Einsteins theories on relativity is pretty clear on that one.
Do you believe that "2+2=5"?
No, even with modular arithmetic you won't be able to pull that one off.
Do you see the contradiction?
No, mathematics and physics don't contradict each other.
Can you even see one as a consequence of the other?
No. Why should general relativity lead to faulty mathematics?
You get a prize for being the first to mention Einstein.
Your prize is to explain the relationship between the theory of relativity and the philosophy of relativism - in your own "pretty clear" words.