“If you could ask the Apostle Paul one question, what would it be?”
I'd ask him what he thought of all the people that have made an idol out of him claiming to follow his teachings while ignoring Jesus' teaching claiming Jesus was teaching the law of Moses to the Jews so Christians should ignore the teachings of Jesus (sounds strange but I've seen people making this claim)
Paul of course had something to say about this:
1 Timothy 6:3-5
If any man teach otherwise, and consent not to wholesome words,
even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;
He is proud, knowing nothing, but doting about questions and strifes of words, whereof cometh envy, strife, railings, evil surmisings,
Perverse disputings of men of corrupt minds, and destitute of the truth, supposing that gain is godliness: from such withdraw thyself.
Paul would in fact be correcting these people pointing them to what Jesus said:
Luke 16:16
The law and the prophets were until John:
since that time the kingdom of God is preached, and every man presseth into it.