However, those are western civilizations which value rationality and equality. Rationality and equality (and inclusiveness) aren't values in a great many cultures.
You should really travel more, especially to cultures where you consider are below yours. Hopefully one day you'll come to the realization that humans are not that different from each other.
First, no-one mentioned cultures being superior until you did. Why is being rational, equality-oriented, and inclusive in your eyes superior?
Second, I'm sure there are some wonderful people in cultures where women (for example) are considered second class citizens. If I travel there and return with some feel-good anecdotes, I fail to see how that changes anything.
This is an easy problem to solve. You can start open borders restricted to EU. This is a reason for particular implementation of open borders, not a reason against open borders.