Generally Kalam supporters try and get out of the regress either through the Ontological argument (which has been beaten to death on this forum ) or trying weasel out by saying only things that "begin to exist " need a cause of course never answer the question accept by assertion or as CD has done by theist new speak why god should be in this category and not simply a meta existence. Also he clearly has not read Hawkings last papers before he died as they present problems for his Kalam narrative .
Seek strength, not to be greater than my brother, but to fight my greatest enemy -- myself.
Inuit Proverb
Inuit Proverb