I have huge respect for people that have passed the test of going against their environment and comrades to do what they think is right (even if/when I disagree with it or it harms my interests). You can argue that he was insincere or a double agent (this is definitely wrong), you can argue he's a traitor by endangering people who had nothing to do with it (weak argument IMO), but arguing from an armchair that he must have walked full length is just silly I think. Let's have an extreme and inverted thought experiment to test your views. Imagine someone blows the whistle about FSB's Ryazan sugar [1] today, must he not run and let his head be smashed with a sledgehammer in a prime time TV show?
[1] https://en.wikipedia.org/wiki/1999_Russian_apartment_bombing...
Cowardice is the greatest of the sins for it begets many of the others. Or if you insist on colloquial Russian: не можешь срать - не мучай жопу.
If you stand on the path of martyrdom for your people you should be prepared to follow it to conclusion rather than fleeing to the sworn enemy.