This isn't a super out there PC statement that is being made. It's simply saying that this is a professional event and the expectation is for the relationships to be kept professional. You know, how it should always be.
That's not tumblr craziness, that is just basic respect and professionalism.
Of course you don't see this happening. Of course you don't see discrimination in the workplace. Maybe - just for once - accept that the people who actually do face this stuff are telling you that it does happen, and that we should do something about it. Maybe try listening to a perspective - any one will do, really - that is different from your own.
The worst part it is the way it has become acceptable to bash "white dudes" for the color of their skins and/or their gender.
If this is "racism" or "discriminatory", it's the least effective ever, and any comparison to the biases experienced by women and people of color is insulting.
Firstly, discrimination in the workplace is not limited to "non-whites". Secondly, you cannot claim the supreme and unilateral right to determine what constitutes discrimination based on your race.
Simply stating "you're white and therefore you cannot see it" is both unreasonable, racist, and, if put forth as grounds for legislation, incredibly corrosive to the notion of rule of law.
The idea that only whites as a universal class are somehow unable to perceive discrimination is ridiculous and highly offensive.
You should apologize for your comment.