Nah man, the "dont say controversial shit on the job" is a very tired argument. The slippery slope is a real argument that is based in reality. Just look at events like this one and say to me with a straight face that is hasn't become 1000 times worse in the last couple of years. I say whatever I like and feel is fit for the current discussion.
If you don't like that, you may choose not to hang with me. You decide for yourself, not for me. If you think your coworker is a shitty person because what their opinions are then quit the job, don't force others to do it in order for you to have a safe space.
That is what I believe and fight for. People don't tend to realize that next time you may be the victim and then I'll defend you, the hate-crowd which you defend this time won't.