It seems the Left Handed Elves can't differentiate between Orcs and Goblins because they refer to Malooc (goblin horde king) as refering to Malacath, the Orc King.

This'd be the Redguards, not the lefthanders. I believe it's a purposeful reference to the Daggerfall-era lore which has Redguards fighting giant, portal-spawned goblins upon their arrival to Tamriel. Compare to how Malacath was made from Trinimac.

So Malooc is not Malacath then? Could goblins to Malooc be the same as orcs to Malacath? Maybe the same daedra transformed some entity into goblins, similarly to how he transformed elves (chimers?) into orcs.

The Chimner were transformed into Dunmer by Azura. It was simply a specific group of Altmer, the followers of Triminac, that got changed into Orcs and thus became Orsimer when he became Malacath.

I suppose this topic was made in reference to the post I had made within your last thread.

Very little is known about the Left-Handed Elves. There isn't anything in the lore that I know of that mentions the Left-Handers even recognizing Malooc. As far as I know, Malooc was a god known only to the Yokudans, or Ra'Gada.

We know that the Ra'Gada supposedly wiped out the Left-Handers. What we don't know is when, exactly. We also know that the Ra'Gada mislabeled Orcs as goblin-kin upon their arrival in Hammerfell. In Skyrim, we learn that the Orcs have a deep cultural affiliation with the material orichalcum. Before Skyrim's revelation, orichalcum was only known to be used by the Left-Handers in constructing the orichalcum tower, and it was introduced to the Ra'Gada by Diagna in order to defeat the Left-Handers. It is unknown on whether or not Malooc was recognized by the Ra'Gada before or after the Left-Handers' fall from glory. Personally, I do not believe the Ra'Gada truly brought the Left-Handers to extinction. Allow me to explain.

In Vivec's Sword-Meeting, one individual claims that the Left-Handers had an empire four times the size of Tiber Septim's. It seems like an obvious exaggeration at first, but let's pretend for a moment that the Left-Handers held Trinimac in the highest regard. Some sources say that Trinimac was held in higher regard than even Auri-El by some Aldmeri, and many more sources claim that Trinimac was the strongest of all et'Ada. The gods of TES are empowered by the faith of mortals. If we consider the statements made about the Left-Handers' empire as accurate, and if we consider the idea that they were primarily devoted to Trinimac, it only makes sense why he was more powerful than even his king, his forebear. As for the Ra'Gada, we know that they are badass. We also know that they are capable of incredibly powerful "sword-magic", and that they can produce a powerful force within a being known as a HoonDing. As I mentioned earlier, Diagna was the god who introduced orichalcum to the Ra'Gada, and it was through the use of orichalcum that they were able to ultimately defeat the Left-Handers. Diagna was also a HoonDing. Nobody ****s with the HoonDing, so I can't help but wonder why it was necessary for the Ra'Gada to employ orichalcum against the Left-Handers while a HoonDing was present. Seems a bit overkill when we consider the boons and abilities of the Ra'Gada. I believe the Left-Handers had Trinimac at the time, and I believe orichalcum has a deep religous significance with Trinimac. As for the extinction of the Left-Handers, I believe the remnants became the Orsimer. This is based on the association of orichalcum with the Orsimer, and the idea that Malooc wasn't recognized by the Left-Handers because he did not exist until after Trinimac's fall. It is also worth mentioning that the Ra'Gada holding a seathing hatred for the Orsimer. Perhaps they recognize their ancient foes to a degree within the Orsimer.

So you see, this is my theory. There may be details I do not know of that disprove it completely. It mostly fits, and it gives a new outlook on the Orcs and why the Ra'Gada hate them so much. I do find it odd that the Left-Handers constructed their Tower away from Tamriel. As far as I know, it is the only Tower not constructed on Tamriel. It is the "pariah" of the Towers.

Yes, altmer instead of chimer. So this daedra that ate Triminac and made him Malacath, could he be the one who made goblins from some other elves or man?
Didn't you mention Malooc could be Malacath? But someone said the goblins came from some portal, where does this portal lead to? and who made the portal?

Where do you get this fact from?

So is it fair to say Yokudans are Left-Handed Elves and proto-Redguards. But since Yokudans worship Malooc as one of the gods, then Left-Handed Elves also worshiped Malooc to one degree or another (or fear him same thing).
Ra'Gada are elves or redguards? or are they some sort of god?

The same event that Lady N referenced in her post.

Supposedly, the goblin hordes that attacked the Ra'Gada were able to open portals alike Oblivion gates, which allowed larger yellow goblins to aid them.

I'm more partial to believing that the goblins were in fact mostly Orcs, while the larger yellow buggers that came from the portals were Ogrims. This is based on the fact that some goblins can grow much larger than any Orc, and the fact that Ogrims have large yellow bellies. Again, there may be details I do not know that disprove this theory as well.

Goblin-portal was old, Daggerfall era lore, before just about everything about the Redguards was overhauled in Redguard. It's from http://imperial-library.info/content/compilation-redguard-history, among other places. The "goblins" are giant, unlike the goblins we see today, and terrorized Hammerfell during the 1st era. While the original author likely intended them to be goblins from another dimension (and dwarves to be actual dwarves), the story lines up perfectly with Orcs and their creation, which makes it a nice update to modern lore.

Yokuda was a continent, populated by the Redguards and the Left Hand Elves. The Redguards defeated the elves, sunk the continent, and came to Tamriel. When we speak of Yokudans, we mean the Redguards still on Yokuda, or those recently immigrated to Tamriel. Ra'Gada is a Redguard (yoku) word meaning "Warrior Wave," and is the origin of the name Redguard.