Truth’s motivations for doing this were more than just religious, he saw the Elites as a threat to his power. During the mission Gravemind, we see first-hand the result of Truth’s treachery as High Charity is torn apart by civil war as Brutes and Elites fight each other for control of the city. Truth would later order the Brutes to begin killing their Elite counterparts once the Elite Councillors were grounded on Delta Halo. The Prophet of Truth’s decision to do this was an early sign of his increasingly power-hungry, treacherous and unstable personality that would eventually result in the death of the Prophet of Mercy. The answer lies in the Prophet of Truth’s grand plan to ensure the firing of the Halo Array, as he was certain that the Elites were never true believers and as such declared the entire race Heretics.
