By it's very nature, trying to get him fired involves work. If you're trying to cause strife in the workplace that's fireable in my book.
I don't discriminate at work, full stop. I don't care what you do or who you screw so long as it doesn't affect folks at work. The second you start pushing your political agenda at work it becomes a problem. It has nothing to do with a "safe space" and in fact it is in no way a safe space. Work is not a place to talk politics and push your ideals onto society. We all know these "safe spaces" are just a place for a given "side" to espouse their ideology without having to defend it from rational discourse.