This.I can only speak personally, I'm OK with controlled, legal immigration.
For example, we generally have shortages in the NHS every year. You're a registered nurse? A doctor? Come on over. Those sort of people tend to a) make a useful financial contribution to society and b) they integrate into British culture, especially their children born in Britain.
Boatloads of randoms illegally entering the country and trying to get on welfare? They can fuck right off.