I don't understand how very intelligent people fail to reconcile Europe's experience with immigration and cultural segregation over the last 15 years. Is it a secret? Do we live in a bubble? Europe's laissez-faire attitude and political impotence in the face of growing societal division has empowered aspiring demagogues and left many countries on the verge of massive social unrest - it's not secret that certain cultures are hostile to liberal secular values - Trump's ham-fisted approach will most likely be ineffective in regards to national security but it's clear, based on Europe's experience, that stronger immigration controls aren't necessarily a bad thing. Certain cultures are fundamentally incompatible with freedom of expression (including religious satire), gender equality, and freedom of sexual orientation - these regressive traits are a threat to liberal secular societies - Germany recently introduced gender-segregated swim times, how "progressive"....