I also don't get what's so scary about the big, bad Reconstructionists.
If I understand correctly, they envision an eventual world where Christ has opened the hearts of nearly everyone to the glory of His kingdom.
Shudder. A fate worse than death for some, it would appear. Can't have too much of that glory; we might lose sight of the really important stuff.
I think that's kind of a cleaned-up version of the ideology. There also seems to be this under-current where people who refuse to accept their particular ideology would find themselves disenfranchised, or worse.