In 1944, 18 year olds were storming the beaches of Normandy to liberate Europe. In 2016, 18 year olds demand that college administrators protect their fragile psyches from pro-Trump chalk on the sidewalk.
The biggest problem isn't the student protesters, illiberal and hateful though they are. It's the cowardly (or the shrewd politically-motivated) college administrators who acquiesce to their demands for censorship. It's also the fault of the federal government, which has been pushing absurd readings of civil rights laws to force "hate-speech" codes on college campuses.
If a society wants its values to survive, it needs to have the confidence to defend them and pass them on to the next generation.