i noticed it too
while hostile mobs do not attack their teammates, Golems do,
Zombies do not attack Villagers on the same team either, but iron golems do, Well kinda
Summoning an iron golem before summoning a mob causes him to be slightly friendly to the mob...until he realizes and goes nuts on them, then proceeds to spaz out after,
im assuming all of this is a bug..if zombies dont attack villagers, golems shouldnt murder normal mobs either
Well...Damn,
Yes i actually did use a lead, i just brought them outside towards the pillagers and released them