“placed Hiatt fifth in his list of “The Left’s Top 25 Journalists” for the Daily Beast[20] and third in the similar list he coauthored for Forbes Magazine.”
You can also go back thru time and look at other WaPo house editorials on foreign policy and they consistently take the NeoCon position and criticize Obama
Then there are numerous NeoCon columnists who are published at WaPo such as Krauthammer, Fred Barnes, Jennifer Rubin, George Will, Marc Theissen, Michael Gerson, etc.
You can also do google search of "Washington Post NeoCon".
The point being, this Wapo editorial criticizing Obama is not out of place at Wapo or significant.