Mark Twain in The Innocents Abroad:
“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one’s lifetime.”
Studies show that those who have traveled internationally are more receptive to immigrants. This is one of many factors that can explain differing perspectives on immigration into the U.S. Those that have traveled extensively are more likely to support immigration versus those who have not traveled.
Other factors may include the year of birth for reasons I explain in a Demographics post on my other blog: