Nope, it's what you said. In reply to the question, "Which section of the Constitution do you believe delegates to Congress the power to regulate intrastate drug policies?“, you said, "They don’t have it under the Constitution, of course". And you did say you supported fedgov prohibition.
Therefore, you support a fedgov policy you believe to be unconstitutional.
“And you did say you supported fedgov prohibition. “
Really?
I think you must have hallucinated this one into your reality.