I can't remember if it was you, but someone else said that they go by the Monster Manual as the truth of the game world. I responded to them and you may have been confused by that.
My argument is that the spell says to use the MM Zombie stat block. Therefore the default RAW is to use that stat block as written. Looking at the Zombie stat block, the Zombies created by the spell are by RAW, evil. I don't know how you got from my argument about the stat block to the fluff of orcs.
At some point you brought up MM alignment rules as "evidence" that the Zombies from the spell aren't evil. I pointed out that those alignment rules say that the default(RAW) is whatever the stat block says. Therefore, to change the spell as you want it to be changed would require homebrew.
Changing an individual zombie or even some zombies to be another alignment would not be homebrew, since the alignment rules allow such changes. Only a large blanket change to the stat block or spell itself would require homebrew.
So, let me see if I can walk through this a little bit.
The zombie from Animate Dead is evil, because they say to use the Monster Statblock from the MM, and that says it is Evil.
So, if I was to populate an Orc Tribe, should I not use the statblock for "orc" in the Monster Manual? What other source should I use for RAW orcs?
And, if I do use the Statblock for the orc, what does it say? It says that Orcs are Evil. So, I would assume that any given tribe of Orcs is evil, because they would all be based off the statblock, correct?
Now, I could have an "exception" tribe of orcs. These orcs would not be evil, because the Monster Manual allows me to change their alignment, altering what the statblcok says. That would not be homebrew.
However, I can not have an "exception" zombie created by Animate Dead... because of reasons I guess. To have Animate Dead create non-evil Zombies I would need to homebrew the spell. Because of it requires a larger change than the Monster Manual rule that allows me to change alignment?
See, I get really confused here. Why can I have an entire tribe of "exception orcs" but not use the evidence that zombies created by Animate Dead don't match with the Zombies in the Monster Manual, or any of the other evidence I presented, to create non-evil Zombies using the MM "exception" rule.
If I can't make exception zombies, why should I assume that there even are exception orcs? Or, has it been this entire time that you agree that using Animate Dead to create Neutral Zombies is RAW. If that is the case, I should apologize, because them your position would be consistent.
Nothing you have shown actually says that. You are reading more into those words than are there.
No you aren't. There is nothing in the orc fluff that says that they will always attack others on sight. Absolutely nothing.
Um, yeah, they are very murder happy.
"Orcs are savage raiders and pillagers "
"Such was the role of the orcs, he proclaimed, to take and destroy all that the other races would deny them. To this day, the orcs wage an endless war on humans, elves, dwarves, and other folk. "
"Orcs gather in tribes that exert their dominance and satisfy their bloodlust by plundering villages, devouring or driving
off roaming herds, and slaying any humanoids that stand against them. "
"Their lust for slaughter demands that orcs dwell always within striking distance of new targets. "
"The tribe then sets out en masse to carve a bloody path to its new territory. "
"Savage and fearless, orc tribes are ever in search of elves, dwarves, and humans to destroy. "
"Gruumsh leads his orcs on a mission of ceaseless slaughter, fueled by an unending rage that seeks to lay waste to the civilized world and revel in its anguish. "
"Orcs aren’t interested in treaties, trade negotiations or diplomacy. They care only for satisfying their insatiable desire for battle, to smash their foes and appease their gods. "
"When a tribe is on the move, orc warriors are commanded to scour the surrounding landscape for any opportunity to spill blood and bring glory to their gods. "
"Most of the orcs that stay behind when the warriors go on their raids are weaker than their tribe mates or otherwise not suited for a life of battle....But even these orcs are trained in combat, and all of them are expected to act like warriors if the lair is attacked or threatened. "
What in any of that quoted text makes it seem like you are likely to find a peaceful orc tribe? All of it makes it sound like if you are found by orcs, they will attack you. I guess if you are heavily armed, armored, and sufficiently outnumber them they will choose not to commit suicide, but all of this points to a people who will attack any civilized humanoid on sight.