Tolerance and pluralism should be "drilled into the head of each citizen". They are the basic principles of democratic societies.  It's why we aren't the U.S. with its 'New Jim Crow' system, prominent alt-right (white supremacist) movement, rabid anti-gay blocks, ridiculous gun violence stemming from fear and high inequality because people don't want to help 'others' that don't look like them (e.g., healthcare). The most tolerant and pluralistic U.S. states, such as New York and California are the global centers of excellence in the U.S. (e.g., Silicon Valley) because they embrace tolerance and pluralism.  Not surprisingly, they also drive the U.S. economy. Why wouldn't you want some of the best and brightest of the world coming to work in your country. Of course all immigrants won't be beneficial, but it's the net benefit that matters.