explanation

The episode revealing Archer's backstory as a Counter-Guardian shows multiple instances where the threats to humanity he destroyed involved men who look a lot like Muslim terrorists.

The same day this episode aired, the U.S. military announced they had killed a senior Islamic State leader , the first actual instance of American soldiers being offensively deployed against ISIS. It becomes twice as amusing when you take into account another Archer leaving another organization named ISIS due to the same current events.