Who throws the dice for you?

[Anomalocaris]

If God does in fact exist and created/maintains our reality then there should also be observations which cannot be explained by natural mechanisms. Quantum randomness is such an observation.

Now keep in mind, quantum randomness isn't something that hasn't been explained by natural mechanisms. It is an observation that has been scientifically shown that it cannot be explained by natural mechanisms.

Can anybody say "argument from ignorance"?

It is not an argument he is advancing, but bullshit.

An argument from ignorance ought to at least embody some feature which can in principle make it distinguishable from other possible propositions that could be advanced under the same absence of evidence to the contrary, should the absence of evidence to the contrary under which it is advanced ever be rectified.

His bullshit contains no such feature. Even should the absence of evidence be rectified, his bullshit, by virtue of its inextricability from adjectives and nouns such as "supernatural" and "god" which he pointedly refuse to define, would remain just as vacuous as before.

If you are to replace the word "god" in each of his posts with the meaningless sequence of letters such as "Waaaa", and "supernatural" with "Gaaaa", the content of his posts would in no way change.

So one might conclude that his choice of the culturally loaded words "god" and "supernatural" betrays the fact that he is fight a war of deception for a cultural concept, and his invoking of terms derived study of physical reality is just a false flag tactic, a ruse de guerre, and he has no loyalty to science and no interest in rigorous probing of actual physical reality.