This was just part of her notorious career as a passionate woman and a witch. A Roman reader would have recognized unpleasant echoes of Medea in Virgil's Dido. The other passionate characters in the Aeneid are mostly deplorable. The list is headed by the raging goddess Juno and the raging warrior Turnus. It includes the Harpies, Allecto, Amata, the Trojan Women burning their ships, and the Latins in general when in battle frenzy.
Passion spreads like a virus.
Venus uses Cupid to infect Dido with the passion of love. Juno uses Allecto to infect Amata, Turnus and the Latin masses with the passion for war. In every case except for, perhaps, Aeneas' final passionate killing of Turnus, passion opposes the will of Jupiter, Destiny and Fate. This alone shows us how little Virgil approved of such intense emotion. But there is also Destiny, the notion that there is a necessary future to strive towards.