The revealing statement on this issue comes from the CEO of CloudFlare. They cut off protective proxy service to The Daily Stormer, which lead directly to their host and the host they tried to move to saying "nope, you are too likely to draw denial of service attacks that would hurt our other clients, so go elsewhere." The CEO of CloudFlare was very specific that his company does not intend to become the authority on right and wrong and their policy is to provide service without regard to content. He personally made the decision to cancel service for The Daily Stormer because they specifically claimed "CloudFlare is with us," and he would not allow his company to let that statement stand unchallenged based on potential damage to its reputation.
So, while there may be some amount of "internet policing" going on, it is important to note that a lot of what appears to be such policing is just simple business decisions.