This is a stupid question based upon the false assumption of creationism equal to the unknown....the big bang theory is based upon an observed expanding universe, the cosmology of star formations and black holes... matter possibly collapsing in upon itself by intense gravity of unmeasureable force....all "creators" are religious inventions created by rapist violent shamans long before recorded languages....ultimately your question is the trap of circular reasoning....who created your creator ? Matter and energy can neither be created or destroyed while pathetic bragging for a bigger boogeyman is the history of faith = ENEMY OF KNOWLEDGE

BTW, Hubble’s two hypotheses illustrate Big Bang cosmologists’ lack of concern for evidence.

Doppler shifts are a result of sound from a moving source. Without evidence, cosmologists conclude that light from a moving source behaves similarly. For what it’s worth, sound is a longitudinal wave and light is a transverse wave.

@alexandgeddy2112 We do not have pretty good evidence of a begining to the Universe approx 13.7 billion years ago. We have only Georges LeMaitre’s mathematical attempt to support the Genesis story.

Edwin Hubble hypothesized two universes, the first of them expanding. He summarized his hypotheses in the 1937 Royal Astronomical Society Monthly Notices:

“If the red shifts are a Doppler shift . . . the observations as they stand lead to the anomaly of a closed universe, curiously small and dense, and, it may be added, suspiciously young.

“On the other hand, if red shifts are not Doppler effects, these anomalies disappear and the region observed appears as a small, homogeneous, but insignificant portion of a universe extended indefinitely in both space and time.“

From Hubble’s expansion hypothesis, LeMaitre wrote equations with time the independent variable. He ran time backwards, giving the Vatican support for Genesis and America’s fundamentalist xians a response to Darwin. Many astronomers disagreed, but wanted to do astronomy. They did not want a political fight with America’s xians.

Though all they can say is “We don’t know”, don’t ask that question.

Instead, demand evidence for the bb. Until they produce evidence the bb is pseudoscience. End the discussion, or change its subject.

Every creator needs to be created, so ascribing existance to a creater only answeres the question of creation to the simple minded.

I advocate not using the 'everyday' usage of "theory" to avoid falling into the "evolution is just a theory" trap : [nas.edu]

I think most cosmologists would say "we don't yet know" or "the LHC can't yet determine" what came before the Big Bang.

Here is another view :

[livescience.com]