Are the Dopplegangers really that evil ?

If I am right, in the 3rd Edition, Dopplegangers are depicted as "neutral" alignment.
When we see their deeds in the game, they seems both cruel, devious and evil ...
I'm not very good at AD&D lore, are they that evil, or have they been made evil only for this game (or in the 2nd Ed) ?
When we see their deeds in the game, they seems both cruel, devious and evil ...
I'm not very good at AD&D lore, are they that evil, or have they been made evil only for this game (or in the 2nd Ed) ?
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Comments
http://www.dotd.com/mm/MM00051.htm
Despite the edition, I think they are always neutral, and don't necessary adapt to evil acts. They are 'just' spies and to the lesser assassins (an assa does not need to be evil to kill some1^^) and eventually are used to infiltrate higher political circles.
Haven't tried 'detect evil' in BG(whatever game) though, if they are being shown as 'evil'....at least they are worthy quite some XP
Penalty in both cases is death. Also, at 420XP each, there's no way you can leave them alive!
I mean, I'm not a big fan of D&Ds tendency to say thet x or y race is normally good or evil aligned, but surely eating sentient beings is an evil act?
Other doppelganger clans might be more beneficent.