"Merely immigrating" to you might be "taking our country over" and "stealing our land and resources" to others.
Merely immigrating to a plot of land, proceeding to legally purchase
land--from Arab landowners, no less--on which to live, transforming that land from barren desert to blooming citrus groves and a booming economy, establishing a viable, cohesive society, winning a war of independence and establishing a legitiimate, sovereign state to others.
To many people, allowing outsiders to take your land exhibits a ghastly moral compass.
See previous response for edification.