I would not say hate, but here (where I'm sure there are fewer Roma than in eastern Europe) significant problems are in things like high crime rates*, children being left out of school by the parents (even though they are welcome to go, sometimes they go, then they don't, impossible to offer a program to them when 'will they show up?' is the daily mystery) and any sort of integration seeming to be utterly impossible and simply something they really, really don't want - which makes things harder, when moving to another country, no matter where it is, one should quite definitely try to integrate as well as possible... Of course there's always exceptions, but that is sort of the general consensus based on experience and situations here.
*around a quarter of the Roma under 18 years has already been in touch with the judicial system, against around 2% for the average in that age group