The first was with Orac's featuring of a video put out by the God Hates Fags folks. The narrator talks about how God is going to deal with America the way he dealt with Sodom and Gomorrah. Watch till the end for an utterly disgusting smirk. At least there I could dismiss them as fringe.
Second, I was browsing through old issues of Free Inquiry looking for articles by Robert M. Price and found a review of the Left Behind novels whose title says it all: "Turner Diaries Lite." The Turner Diaries, for those who don't know, is a piece of racist propaganda that inspired Tim McVeigh. As the author explains
The Left Behind series and The Turner Diaries each present a nightmarish, through-the-looking-glass world. Each work's hero is an insurgent against an insidious, uncanny conspiracy of world domination originating in Israel. Each is an evangelist, always on the lookout for qualified recruits. The parallelism of GC and the System, Judah-ites and the Organization, the Trib Force and the Order is clear enough… Rayford Steele's sights are set on a believers-only utopia, Earl Turner's on a gentiles-only utopia.The Left Behind novels are not fringe.