Where did the universe come from? Atheistic origin science has no answer.

[Esquilax]

1.Whatever begins to exist has a cause.

I will note that this clause is worded the way it is ("begins to exist") specifically to attempt to avoid the question of infinite regression. That is the only reason that the first clause is not described as "everything that exists has a cause." Because otherwise we ask what created god and the whole argument falls apart before you even get to the second statement. So you tack on a qualifier for no other reason than to try to cheat your way past a very thorny problem, wherein the most complex thing in the universe is the only thing that wasn't "designed."

It amazes me that you still use such a transparent and pathetic argument.

Earlier versions of the cosmological argument did just say "everything that exists has a cause." The Kalam variant was specifically formulated to dodge the infinite regression problem which, to me, is a clear as day signal as to just how mercenary and dishonest this argument is.

No extra information had been discovered, no new thoughts had been thought: the argument just changed, adding in another bare assertion, specifically because there was an objection to the initial version that was irrefutable. It's just moving the goalposts and hoping nobody will notice.