You stated this:
"A vacuum is merely nothing. If nothing exists then there is your vacuum. It's banal platitude to query the vacuum."
And I stated that vacuum isn't nothing, it has energy, it effects our universe - it is postulated that it played an important role in the early stages of our Universe creation and still has. It isn't "nothing".
Hence like I said in the beginning, an educated creationist would simply ask "Where did vacuum come from?" or for instance "Why it has the properties that it has and not others?", simply answering with "The unc. principle dictates that it is and always was", wouldn't be an adequate answer.