The Netherlands already voted for a Eurosceptic, invoking similar rhetoric as you here - "replacement" of locals by foreigners, taking their jobs, etc. Interestingly, as is almost always the case in Europe, the places with fewer immigrants voted more harshly against them.
The question we should ask is whether this is rational or not. I think not. If the Dutch want to vote themselves into a Brexit, then so be it - the foreigners will go elsewhere, trade barriers will be erected to "protect" the local economy, and time will tell who will be ahead economically and culturally.
