That's a profound observation suggested by Dennis Prager in Why the Left Loathes Western Civilization. Actually, it's just one of the profound observations he made. Some excerpts:
[The left] dismisses virtually all Western achievements, but regards criticism of anything non-Western as racist, chauvinistic, imperialist, colonialist, xenophobic, etc.
His theory is that the left hates the west because of the high standards the west has set. He continues:
The left hates standards -- moral standards, artistic standards, cultural standards. The West is built on all three, and it has excelled in all three.
Why does the left hate standards? It hates standards because when there are standards, there is judgment. And leftists don't want to be judged.
Plus, the left can't measure up to those standards.
Mr. Prager has certainly put us at a good starting point for exploring why they hate us.