Kromo, "correcting" 10 Clarion Street's "...never come into contact with foreign cultures, unless travelling abroad", replies:
"[Unless] ... going to the cinema, or going to museums, or buying foreign foods, using foreign words that have 'migrated' into our language... following foreign religions like Christianity..."
Not quite sure you're doing justice to Clarion Street's point, Kromo, or maybe he's not doing justice to himself. However, you're not trying to make the case for multiculturalism and mass migration, are you?
Remember Trump's great speech in Poland in praise of Western civilisation:
"We write symphonies. We pursue innovation. We celebrate our ancient heroes, embrace our timeless traditions and customs, and always seek to explore and discover brand-new frontiers".
Open societies are curious and innovative. They are "progressive" - in the best sense of that word. They advance because they observe, learn from and copy other cultures. For instance China gave us paper, gunpowder and the printing press. Europe exploited all these inventions without ever seeing the need to import ten million Chinese.
Closed societies based on fixed ideologies constrain curiosity and innovation. That is why the West is rich and continually inventive while the Islamic world is economically backward and scientifically and intellectually moribund.