Oh they'll glory in the diversity not realizing there will be none of that sentiment headed back in their direction, and that they are contributing to the extinction of the values system that gave them their standard of living.
You are so correct in your assessment: "... none of that sentiment headed back in their direction, and ... they (the liberals) are contributing to the extinction of the values system that gave them their standard of living."
But the saddest part is - the extinction will take place before they realize it and then it might be too late to fix it.