Lack of exposure to diverse cultures is a big factor. The lion's share of posters who fear immigrants live in a bubble. For whatever reason, they lack the confidence to disrupt their boring bubble.

Immigrants bring a work ethic, drive, and talent that our posters cannot match. So, these same posters gobble up all the fear mongering, to exclude immigrants from swimming in their pool.

Notice how those who oppose immigration are the same folks who love their firearms. Weak-minded fraidy cats.