As the some British people complain about migrants 'invading' our country, perhaps its time to recall there are only 22 countries in the world that Britain has not invaded from one time or another (list in AltText).
So leaving aside the violence, we might say the British we often 'economic migrants', the very group some of our political class seem particularly vexed about.
A bit of history to give some context to anti-immigrant rhetoric
h/t Mappenstance (University of Richmond)