Your invalid assumption is that those actions make someone nice.

I never made that assumption, you did. I provided the quoted explanation from Wikipedia and stated that was a pretty accurate description of the terms meaning.

You know damn well that the correct answer is non committal. "yes we should do that soon". Under no circumstances was this a real invitation and you do not start suggesting dates.

I don't know that because I've been in that situation and actually followed through. It really seems like you're kind of a dick and use Minnesota Nice as an excuse.