"And a lot of them do" mind providing a source? Getting a green card is extremely difficult, so I don't think that a lot of them do.

"Yes, there are some people who come here with no desire to stay, but they have been in the minority since around 1492."

Good old fashion American exceptionalism. Who wouldn't want to stay in the good Ol' US of A?! 'Murica Fuck Yeah right?