alt Hacker NewsLots of people want to migrate from one country to another, so they clearly think their own lives would be improved (bar a few doing it altruistically).
As for including the locals lives, how? You might be bringing skills they need, or money. Do you mean purely socially? That is very subjective.
I think the media exaggerate the hostility. IMO most of the hostility here in the UK is aimed at 1) illegal immigrants and asylum seekers and 2) Muslims. There is also rising hostility to Jews, but usually from an entirely different group to those hostile to Muslims.
Because it’s quite difficult to tell whether someone is in the UK illegally just by looking at them, I imagine some of that hostility isn’t very well contained.