I can imagine in theory "hosts being problematic", but do you have any examples?
Racist incidents are increasing in Europe. There were 47,210 racist crimes reported across the European Union in 2013.
And anti-racism organisation said this is only the tip of the iceberg because many go unreported.
Muslim women, people of african descent black europeans and Roma are reported to be the most at risk at racially motivated crimes.
Muslim women are more likely to be victim of islamophobic crimes than men and these crimes are often physical and very violent. According to the organisation CCIF 78% of the islamophobia victims in France were women.
Swedish police reports of crimes with an islamophobic motive increased by 69% from 2009-2013.
In many EU countries like Estonia,Greece,UK,Italy,Poland and Sweden the most violent attacks are against black and asian minorities.
The 2015 IHRC report on hate crimes faced by muslims show that 66% of those surveyed had experienced verbal abuse at one point. And 58% of those surveyed felt they had been treated with suspicion or being wrongly accused of something.
I hope these examples are enough. I've experienced discrimination and many of my family and friends have also experienced it.