The theory of relativity has
been criticized mainly on the
basis of its invariant light
hypothesis. the hypothesis constituting the base of the theory.

Einstein himself said: "If the
speed of light is in the least bit
affected by the speed of the light
source. then my whole theory of
relativity and theory of gravity is
false".

Dedicated relativists try to
muddy the water by talking about other things when this criticism appears, neglecting what the
critics are trying to say: if the
base hypotheses of a theory are
not correct. the predicted imaginary physical effects or the
theory cannot be correct. Dedicated relativists seems to have
real difficulties in accepting this
simple and obvious fact.
Ove 1'edenstig
Marsla
Sweden.

https://www.gsjournal.net/uploads/journal_reprints/respondents/journal_reprints_respondents_science_journal_47.pdf