Well, it is a rather divisive ideology, simply as a matter of fact.
Here's New Jersey, not exactly a Republican stronghold:
Overall, 42% of employed New Jersey adults considered diversity among their peers “essential,” 29% said it was “important but not essential,” and 28% said “not essential.” While 64% of employed Democrats regarded it as “essential,” only 42% of employed independents and a mere 17% of employed Republicans echoed this sentiment; 52% of Republicans say it is “not important,” compared to 9% of Democrats.