Why did John the Baptist have to die by decapitation?

Question

Why did John not just keep quiet and live a long unhappy life?

Answer 1

i guess he wanted to serve the lord

Answer 2

[edit] John's imprisonment and beheading
According to the Canonical Gospels, John the Baptist's public ministry was suddenly brought to a close, probably about six months after he had baptized Jesus. According to these Gospel narratives, Herod Antipas jailed him, with the Gospel of Luke arguing that Herod was punishing John for condemning Herod's marriage to Herodias, the former wife of Herod Philip, Herod's own brother (Luke 3:19). Some academics have argued that John was imprisoned in the Machaerus fortress on the southern extremity of Peraea, nine miles east of the Dead Sea. {Josephus Jewish Antiquities XVIII:5:1–2}

The narrative states that although Herod himself respected John's authority and the clout of his following, to the extent that he would do John no further harm, Herod's bloodthirsty wife had other ideas, and persuaded her daughter, Salome, to trick Herod. At a party for Herod, Salome dances so beautifully that, according to the Canonical Gospels, Herod foolishly offers her anything she requests, so she asks for John's head on a silver platter, and so John is beheaded. Josephus states that Herod deliberately killed John to quell a possible uprising in around 36.

Herod Philip did not die until about 34, and Herod Antipas did not marry his brother's wife until his brother had died, making Josephus' dating plausible for the biblical account of John's death, according to some.

His disciples, after consigning his headless body to the grave, told Jesus all that had occurred (Matthew 14:3-12). John's death apparently came just before the third Passover of Jesus' ministry.[citation needed]

Neither Josephus nor the Gospels state where John was buried, though the Gospels state that John's disciples took his body and placed it in a tomb. In the time of Julian the Apostate, however, his tomb was shown at Samaria, where the inhabitants opened it and burned part of his bones. The rest of the alleged remains were saved by some Christians, who carried them to an abbot of Jerusalem named Philip. [1]

Answer 3

Herod`s wife hated the things John said about their adultery and in her hateful spite wanted him silenced in the worst possible way.