They Are Metaphysicists Rather Than Scientists

The theory wraps all these errors and fallacies and clothes them in magnificent mathematical garb which fascinates, dazzles and makes people blind to the underlying errors. The theory is like a beggar clothed in purple whom ignorant people take for a king. Its exponents are very brilliant men, but they are metaphysicists rather than scientists. Not a single one of the relativity propositions has been proved.

Nikola Tesla

Sources
New York Times
Tesla, 79, Promises to Transmit Force
Other
July 11th 1935 - Assails Theory of Relativity. as Work of Metaphysicians and Not Scientific.