Always thought this line from the manifesto was banger
All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses his real conditions of life, and his relations with his kind.
This one in particular is good if the person you're speaking to is religious. I used a simplified version to explain my disgust for Saudi Arabia very quickly, and in particular what they have done in Mecca with all their grand luxury hotels around the Kabaah.