Both senses of the word are valid. Read definition 2.
I reply when I see something that makes me want to reply. Your interpretation that as avoidance of some question is incorrect. Frankly, your OP seemed like such a wall of text full of assumptions I didn't share that I figured that replying to it wouldn't be a good use of my time.Posturing means avoiding saying an ET could be God. No one especially YOU have given a reason ET that I described (and that researchers said would be possible) could not be God. That is simple but understandable denial my friend.
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Regardless, sure: a powerful alien could be considered by people to be a god if they learned about it. So what? Where does that get us?
I have no good reason to think that humanity has ever encountered a powerful alien that could be mistaken for a god or that the extraordinary events in the Bible actually happened, so I see no need to explain the one with the other.