• Piglins are simultaneously communal and independent creatures. They have communal housing that is hidden underground, since the further down they go the closer to the void they get and the colder it gets. Which, in the Nether, is the most optimal place for any non flame resistant mob to set up base. It’s also almost impossible to enter a piglin commune without being killed on the spot. If you thought bastions were dangerous to enter then it would be best to avoid piglin communes at all cost.
• Piglins also raise their young as a group, with each member of a ‘circle’ rearing the ‘piglings’ together once they’re old enough to walk around on their own. But before that, when piglings are still small enough to need milk, their ‘sows’ tend to them mostly as a pair. And both male and female piglin parents can produce milk for their farrow, to ensure one parent isn’t taking on the taxing activity by themselves.
• Now gold. The thing that Piglins are notorious for coveting. The gorgeous metal that will stop any piglin in its tracks just so it can gaze upon it, even if it’s full on aggro at the time. Piglins are smart, gold is a valuable resource, it's a naturally magical conductor and enchants easily (not true for all metals/minerals, emeralds are almost impossible to enchant). Piglins also figured out gold’s healing and medicinal properties long before humankind. If it weren’t for them then who knows how long we’d have gone without golden apples?
• Now on to Brutes. The strongest Piglin kind has to offer. And this is no coincidence. Brutes go through insanely hard training to get their titles once they’ve entered maturity. And they endure that painful training to protect their communes, which are always either directly under or within walking distance of the bastions they guard so fiercely. The bastion is actually sort of a red herring somewhat to trick any non Piglins (aka players) into thinking they got the prize so okay yes they can leave now, goodbye. Very clever of the Piglins.
• And speaking of bastions (and gold in general), the reason Piglins become so aggressive when they catch anyone taking from chests (besides the obvious, you know damn well those things aren’t yours) or mining gold is because Piglins have a ritual that they believe must be done before the acquisition of divine gold can be completed. It’s not a long ritual, it’s actually just saying a simple phrase in their native tongue, before accepting the gold/item.
• The closest version of this we all (the players) have is when we say thank you when someone gives/gifts us something. We don’t think much of the act of them saying thank you really, it’s seen as quite insignificant... until it’s not there, then it’s a big deal. Now say we as a society placed an almost religious value on the act of saying thank you.. and suddenly the aggression Piglins show isn’t so strange.
• Their diets are omnivorous is nature, consuming almost anything they can chew and swallow. They’ve even been known to cannibalize their own kind under extremely harsh conditions. But when things are normal they’re known to eat a wide variety of foods, including but not limited to; Hoglin meat, Strider meat, Magma cubes, crimson fungus, warped fungus, and more. Needless to say, food sources are limited in the hellish dimension known as the Nether. So being picky isn’t really an option if you want to survive.
• And speaking of the Nether’s harsh climate, Piglins require water to survive, unlike most mobs in their dimension. Which sounds impossible to anyone who ever set foot there since water evaporates the moment it’s dispersed (aka tossed from a bucket). But water isn’t totally alien to the Nether. Without water fungi cannot grow or reproduce, so there is in fact water in the dimension. So in order to acquire water Piglins must harvest the giant fungi before filtering out the water from them so they have drinking water.