Two Hasmonean brothers fought over who was to rule. Roman general Pompey settled the fight and then headed for Jerusalem and created a massacre of priests.
In 37 B.C. Herod "The Great" became king of the Roman Empire. He was part Jewish and part Idumean and was not accpeted by some Jews who were strict with their religion. Herod died in 4 B.C. After his death the kingdom broke into four tetrarchies.
Herod Antipas who ruled Galilee and Perea in 4-39 A.D. and it was him who killed John the Baptist. Judea was governed by Pilate 26-36 A.D.
Romans destroyed Jerusalem and the temple in the year 70 A.D. Just as Jesus has predicted.
It is uncertain when Jesus Christ was born exactly, but it is estimated he was born in or around 5 B.C.