How are they middle eastern? The only similarity is their dress, because they live in a hot desert.
The Redguards have mosques, cannons, curved swords, a tradition built on trade and war, warrior-nomads that live as their ancestors did, and their invasion of Hammerfell echoes a lot on how the Caliphates expanded so far and so fast.
They also have sage-warriors that can fight with their own soul energy which probably lead to the sinking of Yokuda, and that doesn't show in any culture what so ever. People need to realize that although the Redguards have some parallels to real life cultures, there are no Raga Da in real life. Their culture, appearance, and traditions are their own. We can speculate all we want, but until Bethesda decides to flesh them out more, there can only be here-say.