The General Theory of Relativity says that the universe began with 'the Big Bang'.
Cosmology for a long time like philosophy full of theories and very little data.
The big bang theory has two exceptions (violations) in Science.
Exception 1: It violates the Law Of Conservation of Mass and Energy. Neither mass nor energy is created.
Exception 2: The expansion of the universe from a singularity violated Einstein's own states that nothing can exceed the speed of light. This Big Bang abrogates this by assuming all the forces of nature were one thus the universe could expand faster than the speed of light.
This is just a theory. Wait 50 years years and things may change. Don't forget since gravity also acts on light so light from distant galaxies could be pulled from the galaxy and the earth thus stretching it into the red shift. The red shift does not necessarily come only from speeding.