Yeah, this is a stupid post. Why should someone not be allowed to have political views that are opposed to your own? And why would that make them unsuitable to manage Ruby technically?

Because the impact of them keeping potential contributors away may be larger then their positive impact on the project. If you don't care about the leader's views, you won't care if it's someone other than DHH. If you don't want to work in a community accepting racists, you care if it's DHH. Also in general, world where the leaders are not racists and nationalists is a better place - not sure why that's something that needs elaboration.