Pardon, I hadn't meant to pick a side. I just planned to say "yes" before you posted anything, but was too slow.
As for what went on...
Because most players do not Metagame on this site, it is safe to say that Backstabbing, lying, and being completely unethical is okay IF it wins you the game or ensures you a spot in the draw (somehow).
In real life games, the dynamic shifts because even if players do not meta-game, they remember who stabs, and who is honest. In these cases, stabbing is a calculated risk where you take the victory in one game to potentially harm yourself in the future.
But really, FD is in the right here. He stabbed, he won, how could he possibly have "won better"? This is a game of making friends UNTIL you can crawl over their corpses to victory.