As to your second paragraph, I agree completely. I hate the negativity associated with a term like 'virtue signaling', but it seems like EasyDNS here was looking to virtue signal that they're not doing business with nazis. I expect they'll get a lot more business out of that than if they'd just quietly refused to do business with DailyStormer.
To (poorly) paraphrase someone else's thoughts on the matter, the fact that nazis, or the Westboro Baptist Church are free to spew their bile without censorship gives me comfort that the media has the freedom to be critical of our administration. I understand that this isn't government censorship, but honestly, I'm a little bit shocked that the DailyStormer is still hunting around for a host / registrar, and if this story hadn't broken, I might have gone on just assuming that they'd found a new home somewhere.
Until I was nearly finished with the second paragraph, I thought you were referring to Daily Stormer as the 'real' bastion of free speech you wanted to throw your bisiness at. That sentence could probably be clarified if that's not your intent.
As to the point, I agree that we'll articulated and followed policies would be beneficial for all, but I feel for these businesses as well. They are aware that regardless of how sane their policy or how much they profess to be upholding free speech, they will be called out as Nazi sympathizers and angry mobs will gather. People are not at their most rational currently, and any company hosting them might be affecting the future of their company and possibly even the wellbeing of their employees (which is ironic and sad if true, given the organization at the heart of this).