The Roma are not your problem, man, no matter how many knife attacks there are - and I know there are. But there aren't as many as you think, and there are plenty of violent attacks in the other direction, like people burning Roma houses down with the Roma still in them.
As to your point of Jobbik rallies in Roma cities - yeah, that's true as far as official rallies go. I do quite clearly remember a strongly Jobbik demonstration over near the Tisza last year that was not exactly sunshine and butterflies, though. Hatred does not pay.
And if you think the taxes going to support Roma kids are sapping your economic strength - there are a few ethnic Magyarok who stole 100 trillion forint from you thirty years ago and still have it. You could stack every Roma baby in the world end to end and they wouldn't be as tall as that. Those guys are your enemy, and they are Magyar, not Roma.
Jobbik is misguided, but I don't think they're fundamentally misguided. Their nationalistic principles show promise, like I say. Somebody has to start keeping the money in-country, and they'd be likely to work on that if they can get their heads out of their asses long enough.
Add to that the fact that Jobbik will have to be part of a coalition if they do gain more representation in Parliament (there's no danger whatsoever of a Jobbik supermajority!), and that would temper them a little and let them learn about government, and I think there's hope for the future.
Hungary has only been newly independent for twenty years. They've got time to make a few mistakes before everybody has any right to throw up their hands and say they can't be trusted.
All that said, yeah - your topmost point about the rhetoric used to paint the Jobbik as a threat is 100% dead on. They're all just Nazis reborn! Look at the laws Hungary is passing! Oh, wait, that's another party? Oh, well, all Hungarians are the same anyway.