A Boko Haram refugee was killed in Italy recently, another example of the kinds of struggles that refugees continue to face as they struggle to get acclimated in their new surroundings. Racists are suspicious of these outsiders, which means that anti-refugee violence will be a problem for a long time to come.
Incidents such as this one have been going on for thousands of years, but it was harder to spread news about them without a reliable way to transport information across great distances. With the advent of the internet, information has become instantly and readily accessible at any time and any place across a broad number of devices.
No, these attacks are not increasing in Western Europe. These attacks are similar to attacks that happen all over the world, including the United States. Unfortunately, attacks like this have always happened, but the difference is now a light is being shined on them. Racist attacks have always happened all over the world and there has to be something done about them.
Hate crimes, like the killing of a Boko Haram refugee in Italy, are isolated incidents in Western society today. For the last hundred years, great strides have made to combat, and curtail racism. One incident of violence does not make a trend. If anything, the fact that the refugee was in Italy counters the point that Western Europe is racist.