"Are you the one?"
That question in itself was a bit awkward. John the Baptist and Jesus had history. They were cousins. John had baptized Jesus. In Matthew's account, there was even an exchange where the baptizer balked at immersing his relative from Nazareth. If anyone was to be baptizing the other, John reasoned, it should be Jesus. And then there was the language John used in the wilderness. He baptized with water, but the one coming after him would baptize with the Holy Spirit and fire. John clearly saw himself as a prelude.
"So are you the one? How do we know?"
The answer seems crystal clear. But it only seems obvious after the fact. What exactly was the Messiah supposed to do? Jesus was special, but was he the special one? Is this what John had been waiting for or should he continue to preach of that one still to arrive? After the fact, people read that question as a declaration of doubt. Yet it was a good question. It was awkward, but it was a question that needed to be asked.