No, it is not genocide (definition: the deliberate and systematic extermination of a national, racial, political, or cultural group.)
These people would not be "exterminated" because of their race. They would be dealt with because they are, as I contended earlier, invaders. Their behaviour is becoming increasingly violent. They are using increasing amounts of force to gain entry to the UK and whilst they are not armed with guns, the effect is the same. I'm not particularly fussed that they roam freely across Europe. If the rest of the EU was stupid enough to abandon their internal borders that's their affair. I'm only concerned with the impact they have on the UK and I stand by my contention that their behaviour is increasingly akin to an invasion. Using force to repel invaders is not genocide.