Why do these people complain when they weren't invited?

After watching BBC's 'Breaking into Britain' last night once again the BBC showed 'asylum' seekers as the innocent party. I felt sorry for the Greeks having to put up with all the illegals that flood every available park and street all trying to get to Britain. Everyone of them had a sob story on how hard it was and how hard the Greeks were on them. They chose to get to Greece illegally and are free to leave for home at any time. So how exactly is it the Greeks fault they might get a bit of abuse? do they expect everyone to welcome them with open arms?