One of the examples is trying to find offense in anything - literally from milk and pumpkin spice lattes to national anthem and math and logic as a basis of science. It's ok to think whether our actions could hurt anybody and adjust accordingly, but when it turns into obsessive offense mining and paranoid banning of anything that could that could be construed as offensive to anybody (usually only by the same people who do the banning, not even by the people that they purport to protect) - for some people it is just too much. It's a difference between reasonable hygiene and OCD when a person washes the hands for 4 hours. The first is great, the second is a debilitating disease. Many people feel the American culture has crossed the boundary into the disease and keeps marching on.