Going back to the earlier post on miscegenation and sanctification and Nova’s excellent post here, it bears repeating that diversity is one of the moral tenets of liberalism and progressivism. This is why you see much backlash in the election, calling those who voted for Trump “racists,” “sexists,” “homophobes,” “xenophobes,” and so on.
Indeed, most Christians seem to believe that “diversity” is an inherently good. However, after critical analysis this can be proved false.
The spread of the gospel of Jesus Christ results in a group of believers, called Christians, who are diverse. In other words, it is the gospel that is Truth. Diversity is simply an effect of the acceptance of a Truth.
When diversity is installed as a moral truth instead of the gospel, you create and prop up an idol on a pedestal. This is the deception of the progressives and liberals. They attempt to co-opt the result (e.g. diversity) of a moral Truth (e.g. the gospel of Jesus Christ) and install it as a their own truth, without the backing of any sort of absolute morality.
Hence, what you see today is the cult of diversity crying and whining because people rightly reject their idols.