Further evidence:
The merchants, specifically Ri'saad, tell us that Khajiit are not fond of these "cold, hard lands." That is, many Khajiit would not come to Skyrim, especially when it's in the middle of such turmoil. Ri'saad saw opportunity, however, and decided to trade in a land most of his kind would not even care to enter in the first place.
Also,
This all goes to show me that, while Khajiit may be distrusted, it is only the merchants who are disallowed from entering the cities, on suspicion of things like stealing and contraband smuggling/selling. Also, despite the war, Skyrim has yet to officially secede and is still under the control of the Empire (for how long depends on the player's actions, of course): they still have the Empire's currency and laws. While cities can certainly choose whether to permit merchants to sell their wares within the walls, they can't just outright forbid Khajiit from entering.
The merchants, in this case, are much like the Alik'r: it's not their whole race who can't enter the walls, just groups or businesses who can legally be told "no, you can't perform your business here."
Thoughts?
(I'm getting offline to get onto Skyrim soon, so I won't be responding to the thread, but I'm hoping for something good when I come back!)

