I am wondering why there are people who can imagine that the physical universe always existed and that it had no creator, but the same people can't imagine that God always existed and had no creator.
If you believe the first, why is the second necessary?
I have no problem with an eternal deity in concept. I just don't think any actually exist.
The problem comes from those that say everything has a cause and then make a special pleading for their deity. That is just violating their own rules.