Christians and all abrahamics make the mistake of confusing or equivocating arguments for the existence of god (a necessary, perfect, creative being) and the existence of THEIR deity, Yahweh. There are reasonable arguments to be made for the former, even if they do not ultimately succeed, however there are no reasonable arguments for the existence of Yahweh. Christians will make cosmological, transcendental or ontological arguments for god, and pretend they have proven the existence of Yahweh. The only "argument" for Yahweh is: "this book says so"
arguing for an agnostic deist style God is pointless because not near as many people would be interested in the question of gods existence if the answer did not imply the answers to what the actual question is which is "what happens after we die?". I'm saying you're correct, but also that literally no one cares about proving the existence of a supreme being they can know nothing about