If you can say the manifold is not created, but it contains created things , say they are all necessary and say it isn’t necessary to explain how that happens. You cannot rightly expect further explanation from someone who merely proposes something that is not created.
You have a duty to explain your notion of the uncreated created You also need to explain what the non contingent parts are......or give up.
So nothing wrong with not knowing a lot about a lot wrong slagging someone of for not knowing.
You are making the
specific (even if somewhat meaningless) claim that something called "God" is a necessary being. You have not explained how it is possible for
anything to be necessary, pretty much all you've said is that it would have no external explanation. Neither have you explained how something that is anything like most conceptions of gods (as thinking beings that make choices) can exist without depending on time.
It really isn't up to other people to create anything any
more coherent than your undefined and incoherent nonsense. So, no, I have no duty at all to explain anything. I've pointed out that there is something (which we have strong evidence for) that doesn't appear to have an external explanation. That, in and of itself, is far more credible, coherent, and meaningful than your vague hand-waving about some undefined "God".
Write out 500 times: "I must remember the burden of proof".