The UK has imported some terrible individuals, some child killers, others violently beating people up, robbers, benefit fraudsters, the list is endless and still they keep coming, its truly awful.
The UK has also exported some terrible individuals as well. This is all part of the neo-liberal EU's quest for the cheapest labor in its deregulatory race to the bottom. Any thinking person should have known that open borders would result in the migration of criminals, scofflaws, as well as those fleeing creditors at home. Typically, the EU elitists didn't care about the social chaos they were unleashing, and slowly that has created a backlash. The pigeons are now coming home to roost.
Some countries should not have been allowed freedom of movement at all never mind at 7 yrs after joining the federal state.
The EU is not a federal state, it is better described as a confederation. EU elitists want a federal state to further weaken the member states. It won't become a federal state without a war to impose a continental constitution, which has so far failed to gain acceptance, to permanently change the existing order.