Iron Golems can retaliate against villagers

I don't even know what to say here, gentlemen. What a ridiculous oversight! Now, let me explain.

To reproduce

1. Summon a villager.
2. Find an iron golem and fly above it.
3. Summon a snowball with the "Owner" tag matching the villager's UUID.
4. You have created a monster.

Alternate method:

1. Spawn a villager with an iron golem above it.
2. Trigger and then win a raid.
3. Watch the villager celebrate and fire off fireworks.
4. When the fireworks explode, the iron golem is hurt and then retaliates.