Please also keep in mind that, as far as I know, more Republicans than Democrats voted in favor of Lyndon Johnson's civil rights legislation. The original intent of proposing this legislation, in the words of people like JFK and MLK, was equal opportunity for all regardless of race, rather than affirmative action.
Asian-Americans in California are actively protesting against affirmative action in college admissions for effectively being reverse discrimination against whites and Asians. Also, traditionally, many Asian-Americans voted Republican:
Here in North America, there are large numbers of registered Republican Buddhists. Many of them are Asian-Americans, immigrants or the descendants of immigrants who fled left-wing violence in their native countries. One can only believe that Buddhists are naturally aligned with liberalism if no time has been spent among Vietnamese, Cambodian, Thai, Chinese, or other Asian-Americans. Anti-Communism drives many such Buddhists into the Republican Party, as does similar views on traditional values, economic policy, patriotism, and other issues.
One of the greatest disconnects with the Democrats is over abortion, which the Democratic Party supports and the Republican Party opposes. The belief that life begins at conception is nearly universal across Buddhist Asia, and the overwhelming majority of Buddhist monks, nuns, and priests believe abortion to be a violation of the first precept. This has led many Buddhist leaders in Asian-American communities to endorse Republican candidates. At the same time, we have to be careful about stereotyping Asian-American Buddhism, a diverse phenomenon that also includes many Democrats and other liberals.
When we look at the wider picture, the chorus of convert Buddhist support for liberals looks less like a religious position, and more like a class and ethnicity one. Most convert Buddhists already supported a liberal political orientation before they became involved with Buddhism, and convert Buddhism draws heavily from a section of the educated, white, middle-to-upper class demographic that supports liberal candidates regardless of whether the individual believers are Buddhist, Catholic, Protestant, Jewish, or agnostic. Naturally such people are attracted to elements of Buddhism that seem to resonate with liberal values, but it is worth asking how much of this is an inherent liberal bias within Buddhism, and how much is the process of picking and choosing which selects only compatible parts of Buddhism and leaves aside other, central practices and views that are less supportive of liberal positions.
I am by no means a fanboy of Trump or the GOP. I believe that Republican politicians are often too beholden to big donors and right-wing talk radio, and that Trump is an offensively prideful person. At the same time, I have discovered that the GOP is often the lesser of two evils in matters of actual policy substance.
By the way, here is a quote of Lyndon Johnson cited by black conservatives:
These Negroes, they’re getting pretty uppity these days and that’s a problem for us since they’ve got something now they never had before, the political pull to back up their uppityness. Now we’ve got to do something about this, we’ve got to give them a little something, just enough to quiet them down, not enough to make a difference.
While the above might not be an exact quote, it almost certainly reflects what Johnson believed from practically everything else we know about him.
According to black conservatives, Democrats give the black community just enough social programs to keep their vote, but never enough individual empowerment for black people to earn for themselves a decent standard of living.