He did, initially, but then just a week or so ago, carried out with his plan, to little fanfare.
Apparently there were other repurcussions from those peaceful folk, besides the UN folks.
Two Christians Killed, Churches Burned: Extremists Respond to Florida Koran Burning
Islamic Group Places $2.2 Million Bounty on Head of Koran-burning Forida Pastor
Afghan Mob Kills 10 United Nations Workers (8 shot, 2 beheaded over 'Koran burning')
Whoops, that last link is the same story as shown in this thread, with a different headline.