I happen to be a theist whom considers the argument, about whether or not the universe had a beginning, to be a redundant and needless premise in the kalam argument (apart from justifying use of the word cosmological in its label) for the following reason:
If the universe is infinite, then the universe itself, would of necessity be the uncaused cause!
So even if I accept the possibility of the universe being infinite (and it just so happens that I do), the premise that anything which begins to exist, needing to have been caused to exist, is still sufficient to support the logical deduction that there must exist an uncaused cause!
So if there is an uncaused cause, one need only ask oneself what the attributes, or qualities, an uncaused cause, would, of necessity, possess, in order to be an uncaused cause. Amongst other things, it would, at the very minimum, have to be eternal, powerful and creative! These three qualities are often attributed to the God concept espoused in a number of belief systems. Have there been any concepts, other than God, throughout history, credited with all three of those qualities (i.e. potency, creativity, and timelessness)?
If you'd prefer to label it as something else, that is your prerogative. But do take care to resist the temptation to apply, any labels, already assigned to completely different concepts, such as purple unicorns, planet orbitting teapots or pure nonsense.
Because to do such a thing, would be tantamount to indulgence in the Dawkins delusion, and I really do want to believe that you are intelligent enough to think for yourself, rather than to parrot the mistakes of that logic bereft moron.