They are protecting their economy for UK citizens (subjects).

This is not a personal vendetta. The topic of the large chuck of unemployed UK versus working immigrants is hot right now. As is the disastrous results of a recent relaxing the border. As is the topic of a semi-healthy UK economy in the midst of the Eurozone meltdown which means immigration is exceeding emigration.

I don't have any links to hand but it was all over the media.