That's actually not really helping your argument, if you compare it to the statistics of anti-immigrant sentiments vs actual percentage of immigrants. In most cases, the areas with the lowest amount of immigrants have the highest amount of anti-immigrant sentiments. For example in Germany, you can literally see it on the east-west divide on the map (as with many things). I wouldn't be surprised if it were similar in the Netherlands, that rural areas are more prone to anti-immigrant stances.

The issues in the countries you've mentioned, are usually based on historical and socioeconomic issues, that came up over time. And some countries didn't exactly do well to get Roma people to trust them, like e.g. Slovakia: https://en.wikipedia.org/wiki/V._C._vs._Slovakia

And that is besides the fact that it's hard to get hard numbers on Roma people, since there are also those who try to hide their origins . You could have a Roma person in your neighbourhood and not even realize.