At one time, the theory of the so-called “Big Bang” (thought up by a theologian) was too religious for irreligious scientists, who actually used to think that the universe itself was eternal and had always been there. Then observable red shift proved the theory. (Whoops.) Since then, they’ve been scrambling to secularize the theory somehow . . . desperately . . .
If a singularity caused the expansion it had to exist in a specific point/time/space.. Thus the eternal universe theory.
Both theories are valid, and both are not within our capability to conclusively reconcile. We call these things we can not comprehend dark or black. Not a racial thing, just acknowledgment that we can not see what is happening. Some of the newer thinking goes along the lines of there being a time when there was no time/no space and in fact no possibility of a point. The singularity. One can easily lose ones mind thinking about this stuff.