You can't build a free market of ideas whilst censoring out the "offensive" ones.
We have no interest in building a "free market of ideas." We ban and moderate posts and users every day. If you want to experience a moderation-free market of ideas, 4chan is a few clicks away.
If that's how you want to run this site, by all means. Just remember that moderation, like the absence of moderation, has a price.