"If you are not opposed to this domain being hosted, you are a Nazi sympathiser, regardless of..." - careful @Kaltern. Becoming what one despises, and all that.
I agree that cencership is a necessary evil. But this is more about personal ethics than state censorship. I am strongly for free speech, but would not provide my contracting services to an organization like Stormer. Would you? Of course not. These companies feel the same way, and have done the right thing in my view.