Where do you draw the line, then? Is a racist screed acceptable to you as long as the following paragraph references technical issues correctly?
The language in the blog post is insulting. Imagine how you would feel if you were the person who wrote this code, and now you are being called a monkey in front of thousands of people on the internet. Certainly you've made mistakes in your code before...or are you saying you've always written flawless code without errors?
These codes of conduct always seemed a bit superfluous to me, but after reading comments like these I can totally see why they are necessary.