Final answer:
David Koresh's original name was Vernon Howell, and as the leader of the Branch Davidians, his apocalyptic teachings ended tragically in the Waco Siege. The event had lasting impacts, contributing to further anti-government sentiment, exemplified by Timothy McVeigh's subsequent actions in the Oklahoma City bombing.
Step-by-step explanation:
David Koresh, originally named Vernon Howell, was a charismatic leader of the Branch Davidians, a religious group with millenarian views. Preaching the imminent arrival of an apocalypse, Koresh gathered followers seeking refuge and solace. In 1993, this confrontation with the U.S. government culminated in the Waco Siege, during which Koresh and 86 others tragically perished in a fire under disputed circumstances. The event reinforced Koresh's apocalyptic vision and led him to become viewed as a martyr by some. The Branch Davidians have since evolved, with some awaiting Koresh's prophesied return.
The Waco Siege had a profound impact on certain individuals, including Timothy McVeigh, who, feeling that the Branch Davidians were victims of government aggression, later sought retribution through the Oklahoma City bombing. McVeigh's radicalization can be traced back to his disillusionment with the government post-military service and his belief that the events at Waco were an unjust exercise of government power.