The code actually says that you agree to be removed if you "wantonly behave in a manner inconsistent with" it, and only one of the paragraphs mentioned minorities: they chose to lead with a general requirement to treat others with respect, dignity and empathy, regardless of who they are.
This is not a code of conduct designed to punish accidental "thought crime" against minorities: it is designed to prevent intentionally or recklessly offensive behaviour towards any and all conference attendees.
Sure, it was just one paragraph (or 1 of 5 bullet points in the pledge). Let's look at another:
"That if I become aware of any behavior by others which is inconsistent with this pledge, I shall take immediate action to report such behavior to event organizers;"
Coupled with this in particular from the previous quote: "examples of minority groups include..."
40% of this pledge says: If an event-goer commits and/or witnesses a behavior that could be offensive to a minority group of some sort, thanks for your money but we'll be taking those badges back, unless this hourly event staff member thinks you're cool.
EDIT: Herein lies the rub, and some might say the whole purpose behind CoC's. As a cop might say, you might beat the charge, but you won't beat the ride. Even if you've been tried by event staff for wrongspeak and found innocent, your whole experience is ruined.
Can you quote the jokes and explain how they were meant to belittle women?
Your assertion was "You will need to remain silent if you bully, harrass, intimidate, stalk, stereotype, or belittle." The guys in donglegate did none of those things, and yet they were in fact reported to staff. Over private words.
My point is that you never know what is going to offend someone. This CoC says that you agree to be removed from the premises if someone gets offended, provided they are of proper minority status, which in itself invalidates the whole idea that this is a non-political CoC.