Wow, it looks like you do have CASE!

甲。This is workplace bully;

乙。Only bully itself is NOT necessarily DIFFERENTIATION;

丙。However, bully against a certain racial/ethnic group IS differentiation!

丁。Therefore -- You DO have CASE!

戊。这是个策略问题：最佳利益在哪里？由您个人押上自己的前途，来为社会公义作出贡献，是否对您的要求太高了？而且，人活一生，不太可能一点都不碰到这种事，甚至比这更可恶，不一定每次都要把全部家当押上。

己。个人认为，有更佳的策略。首先，可以 correct that statement with facts you know and your own opinion; 其次，还可以寻求政府帮助，这样，省点律师费（那个律师也蛮黑的）；顶不济，您还可以 claim: Everything of this world is created by us Chinese, and you just stole from us! (It's free to say that:)); 再顶不济，您还可以换个好点的地方待着，美国不是处处这样 -- 如果那样，美国不会有前途，Nobody will care about US.