/r/coontown is a containment sub. Let them have their corner of the net. As you found out, places like this make it easy to find out the real face of someone. I look at this stuff in the exact same way that I see the "Confederate" flag. If you wave that flag, I immediately assume you are an asshole until you prove different. Same thing with the containment subs. I'd much rather keep these people in their corner where it is easy to keep an eye on them than to let them scatter and mess up the rest of a site. Free speech is messy, and sometimes unpleasant. But either we all get it, or none of us will be able to speak our minds.
I thought the point of /pol/ was to be satirical and ironic. Ah well, I guess I wouldn't know. I've never been on 4chan.
Some people there are being ironic. Some people there literally support Hitler. The nature of the set up means that both groups can exist along side each other. Disclaimer: I haven't spent very much time on /pol/ so my opinion isn't one to put much trust in.