Surely you aren't foreign to the history of the team trading away first round picks like they were nothing?
Ron Grahame for a 1st (Ray Bourque)
Rick Martin for a 1st (Tom Barrasso)
Skip Krake for a 1st (Reggie Leach)
Jerry Korab for a 1st (Phil Housley)
Gerry Desjardins for two 1sts (Steve Shutt and Dick Redmond)
Bob Murdoch and Randy Rota for a 1st (Mario Tremblay)
Larry Murphy for Brian Engblom and Ken Houston
Butch Goring for Dave Lewis and Billy Harris
Alex Zhitnik for Grant Fuhr
Darryl Sydor for Doug Zmolek and Shane Churla
Milan Lucic for a 1st that would've likely been Mat Barzal or Kyle Connor (plus Martin Jones and Colin Miller).
All of these moves were far worse, as what the Kings got in return were short term players, and all of those listed were short-sighted moves.
The Kings traded away many picks that turned into Hall of Famers and Stanley Cup champions for many, many years. They also loved trading for over-the-hill players whose best years were far behind them, and achieved absolutely nothing as a result of all of these moves.
Hate on the trade all you want, but calling Faber for Fiala their worst trade in their history is something an uneducated person would say.