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.
My intention is to get the angry dudes to chill out on arguing with every social justice warrior they meet.
Is that the thing you want to disagree with? Or did I make my point poorly?