They do but the vast majority of migrants are through our own immigration scheme into places short of staff to help our economy. In just the same way that some people in places where the economy relies on tourists don't like tourists some people in a country that invites people to come to work ( through our own immigration scheme) don't like immigrants! I think both are very strange attitudes. The people coming here not through our immigration scheme are not invited but are generally used as scapegoats for anything not properly managed.If you are referring to immigration and tourism there is a vast difference. Tourists go home.