Specifically the immigration of people that are hostile to the local culture, and act out that hostility through various forms of aggression.

Citing immigrant population statistics is tried and proven way to cloud the issue. In the Netherlands for instance, the largest groups of immigrants are Germans. You don't really believe the immigration debate is about them, do you?

I'm guessing a fairly large part of the UK immigrant population is Western European. Those, plus migrant workers in science, technology and finance, kind of skew the stats.

Calling everybody who points out that there's also another group of immigrants who's net contribution isn't exactly positive "neo-fascists" is extremely counterproductive.