Of course they could do something about it, they just don't want to because it would be economically painful. Unified trade sanctions against China would likely have effects pretty quickly, but would impact economies significantly more than the Trump-imposed tariffs that everyone is already freaking out over.
I don't think that last line is helpful. If you believe that the Chinese government is akin to the Nazi party, better to make the argument explicitly than to use a term like "Chinazis", which could be interpreted as overly broad and highly insulting in the best case.
