Are they friends or just terrorists? There's no camaraderie among them.
"Lies for the greater good" versus possible "betrayal for the greater good (which I doubt exists)" – it doesn't harm anyone...
What about Pavlik Morozov? He's a moral monster. No way would I betray my family for some party that promises who knows what.
Here, it's important to consider what you're comparing it to. The same betrayal can be viewed in some abstract, global plan... <...>then he is indeed doing good, but if you consider it in relation to a person, he is simply betraying a friend.
P.S.
Is it okay that I'm quoting myself?))))