This is happening all around the western world. US, Canada, most of Europe, Australia, etc.etc. White middle-class people aren't having enough babies to replace themselves so they're making up their population growth with immigration. Every modern 'liberal' Western democratic republic today is growing more racially/ethnically diverse year by year and every one of these countries has a racist right-wing party that harks back to the Nazis and the KKK. The solution to the problem is not simple, and this will probably be the biggest political issue in the Western world for several decades to come.
Put on top of that that in some countries racism is more generally acceptable. The US is screwed up forever on race because of slavery and the Civil War. 150 years later Southerners are still thinking 'We wuz robbed!' and cynical politicians aren't above using this resentment to get votes. But UK, France, Italy, etc. have plenty of racism and xenophobia of their own.
If your Italian friend had grown up in Mississippi he might have heard all through his childhood that blacks ruined their state and are rapists. President Trump, at the very start of his campaign, said that ALL Mexican immigrants are criminals, drug dealers, rapists, murderers, and a few, I guess, are okay.