Hmm, I imagined that the locals were about the same as those trying to immigrate. That said, immigrants do seem more ambitious.
Those immigrants flocking to Europe in masses, climbing over barbed wire are the ones stealing, raping, starting wars. They are local scum basically.
There is no such thing as 20 yo male refugee.
It's impossible concept. If there's a war in your country a 20 yo male is either the defender of his country or insurgent/rebel/snackbar.
Compare this to situation where your grandfather or who ever as a young man would have crawled to Sweden to avoid being sent to defend his country when Japan attacked your naval base during the ww2.
That's coward traitor. Not a refugee.
Don't know the exact motives of Mexicans trying to get to USA though. I understand many of them are aspiring to get a job.
But no one from middle east/africa coming to Europe is coming here because they would be more ambitious or would like to work in peace.