[Big Papa Goat]

As a professor, it's your job to publish well thought out and researched papers. Publishing some spur of the moment opinion piece on a controversial issue is pretty much the opposite of that part of your job description.
There's nothing wrong with firing a professor for the ideas he publishes, because writing down ideas is part of the job, and if his ideas are offensive and poorly thought out, not to mention poorly expressed, then he is just doing a poor job, and there's nothing wrong with firing him.