Earwin, the 'crap' is that you were trying to find sort of rules breaking or abuse in here. I don't blame you, it's a normal reaction of any player that sees Heretics letting Solamnic Knight to reraid.
When some of bullyhead heretik kill on sight any person who cast spell they always said it cast magic near me so i MUST kill em. Now we see smarter bullhead who can consider what spellcaster to kill and what spellcaster to defend, so they already in alliance with some caster, well, what step next? quaf potions? cast spells?
slay em all one time and sac it's precious stuff i said! that only language it's understand...