I think they also got the idea from where Fei was fighting together with Asami against the rebels. Therefore they thought they are friends. But I have to say, Yuri is really crazy, he knows Mikhail has been always interested in Fei, and now he does this? He really wants to piss off Baishe, and then even Mikhail? He has a suicide wish it seems.
Another piece of translation:
A: It seems you do not understand your position.
F: Oh ... What do you want to know?
A: Of course, where is what we were supposed to get?
F: ... in that case, maybe you better give up now? Even if you pursue Asami, it is useless.
A: What?
F: One person said that he had already taken everything.
A: What ... Who is this person?
F: Mikhail Arbatov. If you are an anti-government organization, you should know ...
BUT: ...! ...Mikhail...?
Yuri comes in
Yu: My name is Yuri Arbatov. On this topic ... let me tell you something else.
F (thoughts): ... Arbatov ...?
Yeah, dude, every Saturday they chase together to the disco (-‸ლ)
http://pic1.mangapicgallery.com/r/album/a5/raw_/270411_3690318.jpg