Even if you armor up the zombie, give it a sword, it will never attack back at the iron golem once it is hit. I think this is a bug because skeletons and endermen DO retaliate against the iron golem.
MC-11778
Zombies don't retaliate against iron golems
Resolved
Duplicate
0
Duplicate of MC-729, please use the search function to see if your bug has already been submitted. Currently over 54% of tickets are being closed as duplicate.