Why were these men admitted into Britain, either yesterday or twenty years ago, or in the glint of their fathers eye 50 years ago.  A moratorium on immigration is a minimum policy requirement for any responsible government today. Individuals should be admitted under strict compatibility and ability review. 
Mass international immigration is not a human right. In fact the sad truth. which I wish liberals and leftists would begin to admit, is that mass international immigration has become a human wrong, a destroyer of order and a bringer of chaos and suffering.
This can not continue, not if what we value in our country and culture is to survive.