The thing about the evil "races" debate is that I actually see a lot of potential in goblins and orcs as enemies, but not with the way they are presented in most D&D settings. Those feel incredibly icky for a lot of reasons, most of which y'all are tired of reading about.
So, in the interest of keeping them as enemies while excising the ick, here's some quick lore from my campaign setting!
DROWNED IN HELL
When people are drowned in the infernal waters of the Abyss, they emerge as orcs. Well, adults do. Children emerge as goblins, instead.
The reason why both orcs and goblins are so "violent and warlike", then, isn't biological predeterminism. They're basically possessed by infernal rabies.
And the best part is, they can be cleansed. Purging the Infernal Ur (tainted magic) that corrupts orcs and goblins alike is a campaign-long goal, and not an easy task at all. But it's doable.
If/when the PCs or NPCs manage that, the untainted orcs and goblins won't be called by those names anymore. They'll cease to be driven by rage and cruelty. They'll recover a lot of their former memories and personalities, and they won't need to drown others in the Abyss to increase their population anymore. For all intents and purposes, this will be the birth of two new Lineages of the Folk, embraced and treated as such.
That won't stop new orcs and goblins from being made in the Abyss, however. Shock troops are always useful. Callously killing them, however, won't be so easy anymore. That's the power of an informed decision.
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So, there are three main influences for this take on orcs: the Super Mutants from Fallout 1, zombies, and the Deadites from Evil Dead. The "dunking regular people in evil soup" aspect of it comes from the Super Mutants, obviously, and the possibility of a cure comes from zombies. Deadites were the key ingredient, though, with their penchant for self-harm, mindless abandon, gratuitous cruelty and thirst for violence being an inspiration for the infernal angle of it all, as well as a way of keeping what makes orcs cool without the offensive bits.
As for the goblins, most of the above also applies, with the addition of a wonderful blogpost by @sandromaycry. It's a must-read if you're at all interested in different interpretations of fantasy species.