It is quite clear that this was not an inclusive working environment. Some of the comments on their own are not overtly racist, but it is certainly walking thin line. I've had a situation that was sort of similar where a co-worker made a comment on my clothing being too uhm, urban. Jeans, oversized hoodie (hood up), and shit kicker boots. I was sick, and it was freezing out walked into a meeting and it was announced…
That's not the same thing at all. The guy in question was accused of dressing too "thuggish" when he was wearing skinny jeans and wingtips. In other words, because he was black, regardless of what he was wearing.
A joke was made about how you were dressed because you had a hoodie with the hood up and are apparently white... like Eminem[1][2][3][4].
[1] http://cdn.preview.thumbplay.com/VAN/Thumb_Preview/Wall/UMG/...
[2] http://images.hitfix.com/photos/703638/eminem-hoodie_article...
[3] http://www4.pictures.gi.stylebistro.com/Eminem+Tops+Hoodie+0...
[4] http://inthehoodie.com/blog/wp-content/uploads/2009/06/emine...