...our liberal western values, and political correctness, have unfortunately been our downfall.
Not at all! Our liberal western values are the victory over centuries of bloodshed, ignorance, slavery, female suppression and similar malices.
Name any better century you would like to live in or any better place on earth than the civilised western world.
There are troubles, but our society is strong enough to overcome them.
Millions and millions were killed during and after the last WW fighting dictatorship and now people see the future at risk because a couple of idiots throwing bombs every now and then.