China is a genocidal state, and the supposedly hundreds of millions of supporters of that state policy in China are also genocidal by definition. I see no reason not to disrespect them. This is not "a difference of opinion" it's an ethnic cleansing, not something you brush off to polite disagreement. Yes, absolutely ostracize them, that's what you do to people who support genocide. 100% of the time any civilized person should resist them in any way they can.