I'm sorry to hear that you're upset, Timshuku. If you have a look at the thread, you'll see that mostly what this episode has done has made a lot of us want to visit Romania - and it wasn't somewhere I'd've thought of as a holiday destination before.
You say that Clarkson shouldn't be racist, but isn't your own comment - pointing out that most of the people there are white - itself racist? It seems to me that it has the implication that white = better. Perhaps you didn't mean it that way, but that's how it comes across - these sorts of misunderstandings are easy when there's a language barrier and, indeed, simply cultural differences.
Incidentally, if you ever do visit the UK, you'll probably be visiting London, so I would urge you to go to Brick Lane, which is where you'll find the best examples of contemporary British cuisine - a damn good curry
In the SIARPC segment when Clarkson is talking to Bana, he says something along the lines of Australians being one of the few nationalities who we can have a good argument with, putting each other down in a matey way - that they 'get' the british sense of humour in a way the americans, say, don't. I suspect that's what's happening here.
No offence was meant, and they're like that to everyone: Try watching it again, with the point of view not that they're belittling Romania but that they're laughing at their own expectations of the country and how wrong they were. Remember - the Top Gear presenters are always primarily making fun of *themselves*.
In interviews I've seen, and indeed at TopGearLive, they've been very complimentary of Romania, saying that it was a fabulous place to visit, and in the episode itself Clarkson indicated a desire to stay. I'm planning my bloke's 50th birthday, and I've had various ideas - but a holiday in Romania is currently top of the list. I'd say that actually, from a British point of view, Romania has just had a rather good advertisement.