Well, when a president convicts someone to a prison sentence because they said the president is a nazi, I'm pretty sure most people would call that corruption (if he bypasses the courts and written laws).

I agree not all principles can be effectively codified into rules, and sometimes exceptions are needed, but I do think the exceptions need to be in line with the bigger principles and ethical standards themselves. However I do not think this is the case here. It seems like a clear case of content policing, because the CEO did not like what the Daily Stormer had to say about him or his company.