Perhaps the notion that people are actively discriminating against white guys, and that it's some kind of problem that people should just ignore because eventually it'll go away.
There's about 5 things in there you could disagree with.
(are they actively discriminating? is it just against white guys? is it actually a problem? should people just ignore it? will it eventually go away?)
I'm not saying yes or no to any of these, but I think its pretty obvious people could disagree with any number of things that you've said.
...that said, broadly speaking, I agree with the idea that people should just chill out...but also, that github's growing pains are probably about more than this particular issue you raise.