People don't understand that we aren't in that much of a mess now, immigration is controlled, and there are viable alternatives (e.g. conservative party) such that no one has to vote for a single issue extreme party.
It isn't controlled, we have no control over the skillsets which are turning up, hence we are turning away engineers, nurses, doctors etc etc from elsewhere in the world in favour of as it appears from this thread, toilet cleaners and pizza boys with the odd Romanian gypsy pick pocket.