Makes you get all racist against redneck white trash, don't it??

I think I have to relegate it to my going through another bout of nightmares, and being over-tired to reacting so emotionally today.
It's quite a common occurrence for health care staff to get verbally abused by patients - it's par for the course, and eventually you kind of get immune to all the complaints and yelling. Today was no different - we had a patient who had been waiting for 90 minutes in the emergency dept (I'm going to point out they'd only waited 90 minutes in an emergency department), and they had even gone home in between to get a bit of lunch (so technically they hadn't even waited for 90 minutes), who started getting verbally abusive, going through the regular rants of how incompetent and lazy we are, how they pay taxes and deserve better treatment than that, etc etc. Par for the course. No big deal - I quite pointedly stated that there are other patients, sicker patients, we'll get to you when we get to you.
Eventually, of course, they're chewing out the nurses, starting to become physically aggressive and starting to vandalize the emergency department. We give them another warning - but again, no big deal, still par for the course. Normal behaviour, nothing terribly unusual on a day to day basis.
They then pull out the big guns and start calling us very unladylike names (along the lines of dogs, crude anatomical structures, prostitutes, and the like), which then got me justifiably angry, so I called the OPP to escort them from my emergency department.
Which, of course, made them decide to leave before the cops arrived. But on the way out, they reminded me that I'm just a Chink, and that I should just go back to my country, 'cause people like me don't belong here. (See, that's making me cry again just typing it out). After they left, I couldn't finish my report to the OPP because I was crying too much, and one of the nurses had to give the report.
And that's the crazy thing: I can take verbal abuse, I can take crude language, and dish it out equally, but that (besides being incredibly inaccurate and ignorant, not being Chinese and being born here to boot) just cut me through. And I'm not sure why having my femininity challenged is something that can get me angry and react for justice, but challenging my racial identity makes me so upset. I think perhaps when you hear 'bitch' or 'whore' heard many times in different contexts (including in music and regularly on the street), it becomes relatively meaningless. However, words like 'nigger', 'jap', 'chink', 'paki' and the like bear so much weight and oppression on them, that they are heavy slaps in the face that draw your breath when you encounter them. And they are oppressive terms: terms developed by the white majority to perjure the coloured minorities, and they have been used that way ever since.
The plus side in all of this is that this patient is now banned from seeking care in this particular network, and I explicitedly asked the OPP if that patient came back, and I slugged them in the face, would that be a problem, and they didn't seem to think so, then that's helpful :).