I can't speak for all or most of them.
Only the few I know in my neighborhood..."Asia Town". It's nothing but Japanese (often 3rd of 4th generation), other Asians...White state government workers.
A veritable ground zero for dumb liberals.
Anyway, the Asians are particularly turned off by the GOP's Social Conservatives.
"I would be a Republican except..." is a common refrain.
That's NOT to say I believe the GOP should change it's platform, just an observation in a microcosm.
When the Chinese first immigrated to California, the place was controlled by businessmen who did not treat Asians well. But Hell, businessmen did not treat my Irish-German ancestors well, or my Welsh ancestors (who were colliers, or miners) equitably, either.
Like most businessmen, they shrewdly observed foreigners as competition.
As for the social conservatism of Republicans that Asians dislike, Asian practices such as polygany, multiple concubines, slavery, etc., are not perceived by the majority of westerners with approval. However, Republicans scowl upon the practice of discrimination in University applications, that reject high-achieving Asians in preference of lower-achieving Hispanics or Blacks. Screw diversity. If you’re really good at something, college should not hold you back.
So am I. That's why I'm a fan of Jeb, Trump and Rubio.