Q#2 - John's baptism was both a preparation and a symbol of the spiritual baptism that Jesus was to bring. John's water baptism meant two things.
1. It symbolized cleansing from all sin. A person was being prepared for the cleansing that Christ would provide.
2. It symbolized separation or dedication. A person was setting his life apart to God in a renewed spirit of dedication. He was committing himself to the Christ about whom John was preaching.
Because of their affiliation with the Law and all its rituals for cleansing and purification, the Jews, specifically their leaders (Pharisees, Sadducee s) felt they were above John's baptism. I mean, how can this itinerant, unsightly man out in the wilderness tell us what we need to do in order to be cleansed from sin. Talk about pride. I'm afraid that sinners and some believers as well adopt this prideful attitude. It is especially a stumbling block for the church when directed against God's messengers; our Pastors and leaders. For sinners it blocks them from the Salvation that Christ so wants to give them.
Fortunately there were those around Jerusalem, Judea and the Jordan who flocked to him to hear his message of hope and be baptized. They obviously realized their need for cleansing and repentance from sin. As mentioned earlier, it was the Jewish leaders who were at the forefront of resisting Johns baptism, The Pharisees and the Sadducees.
Two persons often shut themselves off from God.
1) Persons of high estate (those of wealth and social standing).
2) Persons of religion (the self-righteous)
It was true during those days and it is still true today.