Re: I disapprove of what you say, but I will defend to the death your right to say it
I don't think anyone's seriously suggesting people should be /banned/ from expressing such reprehensible attitudes as the Google memo's author; the issue is whether they're entitled to do it at work, from a corporate email address, to their coworkers. Modulo legal constraints on hate speech, that depends on the attitude of the employer. What do you think would happen if you arrived for work wearing a "vote Labour" or "vote Tory" T-shirt or went round the office handing out campaign literature?