Since when is "that's mighty white of you" an insult that can get you fired?

              I got a notice at work the other day that said I can choose to resign my job or attend a weekend seminar on sensitivity training. It seems that a few days ago a co-worker did me a favor. I was greatfull so I gave her the compliment I have given people since I was a kid and that compliment is "that's mighty white of you!" Well she didn't say anything but then I get this notice that because of what I said it's either be fired or go to some sensitivity training. I don't understand some people. My boss called me into the office. Usually he's a reliable guy but even he was on her side.

            I go into the boss office and he looks at me and says, "Ted, a co worker has lodged a complaint against you. She said that she got you an extra cup of coffee and that you thanked her by saying 'that's might white of you; is this true?" I turned to my boss and said, "yeah, so what?" He comes in with "Ted, you can't say stuff like that around our office. She got terribly offended. Don't you know that Connie is Ojibwah?" Now how am I supposed to know what she is. If she and her Ojibwah people don't like being paid a compliment maybe they can all get on a boat and go back to where they came from! At least that's how I feel but no my boss who I thought was a stand up guy is on her side. Now I have to give up my entire Saturday so I can go thru this Marxist indoctranation crapola and learn how to be sensitive. I am sick of people like my co worker coming to my country and than expecting that all the rules be changed. I never met an Ojibwah people (that's how she spells it on the complaint form) before and I don't care to meet any others. If they can't adapt to life in the U.S.A., maybe it's about time they got on the boat or the plane and headed back to the country they came from. I am sick of people coming to this nation and not trying to adapt to our ways. America is my country. I am a Christian. I speak English. I will not have foreigners or people born to foreigners like my co worker telling us what to do. This is ridiculous and needs to stop.