Well good on you for getting through that situation, but you saying “oh, well maybe he just wasnt carrying” doesn’t really help your point. We can’t expect everyone to be carrying, at all times. And even if everyone could carry at all times, we still can’t expect everyone to be able to pull the trigger. You did, but that’s why people in your role are hailed as heroes for what they do: because most could not do it.
My assumption would be that he hoped he could at least become a martyr for the Russian people. It is one thing to be accused of crimes, and flee your country forever, it leaves space for Russians to think “well if he is an innocent man, why is he on the run? If he wishes to represent this country, how can he if he flees it?”. Maybe he hoped that by coming back and facing the ridiculous charges, it could at least give him some credibility with the citizens who would maybe see the absurdity of it all, and maybe spark some kind of political unrest. It obviously didn’t work, but in the face of the hopeless political situation in Russia, can you blame him for trying?