Death touch broken
A creature with death touch activating an ability that allows it to do non combat nuke damage should not be triggering death touch. Coding for death touch is broken and allowed players to use cards that give death touch creatures a non combat nuke and kill creature at will giving them un earned wins. This needs to be addressed and fixed.
According to the rules any damage dealt by a source with deathtouch destroys a creature the damage is dealt to. In this case the source is a creature with deathtouch which can deal non-combat damage to any other target
702.2b: A creature with toughness greater than 0 that's been dealt damage by a source with deathtouch since the last time state-based actions were checked is destroyed as a state-based action. See rule 704.