Far Beyond the Stars is just one of those episodes I suppose I don't "get." Though often enough when I voice this though, DS9 fans look at me as if I was speaking blasphemy or something. It's an interesting premise and certainly it's fun to see all the characters out of makeup, but the overall theme of it really doesn't seem to have anything to do with DS9's story arc.
Certainly racism in the 50's is a worthwhile theme to write about, this isn't really what Star Trek should be doing. If they wanted to do a show about the horrors of racism, hello they have several races that hate each other most prominently the Bajorans and Cardassians.
So the whole episode just seems rather out of place, and too close to a time travel episode for my tastes. Supposedly, I heard somewhere, it was considered to have What We Leave Behind close with Benny writing it as a finish script and I'm glad they didn't do that. It really would've just been a facepalm moment turning that hilarious It's a fake/It's real! youtube video into a general application to the whole series.