Why do liberals say Bush lied about WMD in Iraq when it came out several months ago Wikileaks proved him right?

Maybe because Bush admitted there were no WMD in Iraq. Then Bush went on television and made jokes about they must be out there somewhere. This was during a White House dinner and over four thousand troops died and Bush is making jokes. The CIA informed Bush three days before he attacked Iraq they couldn't find any WMD. Perhaps Wikileaks isn't so well informed on the facts.