The baker case is very very specific, because it came down to the question: Is the cake art? If it is, and your business is to make are, can you be compelled to make art against your beliefs? If I recall, the bake got rid of all custom cakes and got in further trouble for refusing to tell cupcakes to homosexual couples.

But going back to the above post: at one time homosexuality was considered this abhorred plague, just has bad as modern day Neo-Nazism and white supremacy. So who decides what is and isn't acceptable speech?

When you start closing down those roads, you easily squeeze out any descent or ability to form new moral ideas.

In the case of 8chan, you're spreading these people to even more constrained services that amplify their view. You don't get less hate; you just bury it underground and give them they feeling like they're being persecuted. It will make the situation worse, not better.