Yajur Veda 13.12,
”O king, make progress in thy duty of administration, extend happiness to the virtuous. O terrible chastiser, burn down the irreligious foes. O splendid person, humiliate and consume utterly like dried up stubble, him, who encourages our foe.”
Atharva Veda 12.5.62
Rend, rend to bits, rend through and through, scorch and consume and burn to dust, the one who rejects the Vedas
Atharva Veda 12.2.23
He who dwells fixed in the atmosphere, smiting the blasphemers of the god that do not sacrifice to him be reverence with ten Sakvari-stanzas.
Atharva Veda 10.3.3
This charm shall conquer and cast down thy foemen. Be thou the first to slay the men who hate thee.
Atharva Veda 20.93.1
May our hymns give you great delight. Display your bounty, Thudered. Drive off [kill] the enemies of the Vedas.
Everyone must kill Blaspemers:
Rig Veda 6.72.1
ye killed all darkness and the Gods’ blasphemers.
Srimad Bhagvatam 4.4.17
Sati continued: If one hears an irresponsible person blaspheme the master and controller of religion, one should block his ears and go away if unable to punish him. But if one is able to kill, then one should by force cut out the blasphemer’s tongue and kill the offender, and after that one should give up his own life.