He spends a lot of efforts to establish that the metal piece is the tail piece of a Russian-made OFAB 250-270 Fragmentation High Explosive Bomb. No argument there, I'm sure it is. Said bomb has 92kg of explosive. Which is quite a lot.
- If said bomb has exploded in this not very large room, all those cardboard boxes would be torn to pieces and burned. To say nothing of a lot more damage to the room itself. Therefore it did not explode in that room.
- If said bomb was a dud and did not explode, where is the rest of it? Therefore the bomb is not a dud.
- Therefore the bomb piece was put there to make it look as if the Russians had done it. (And not very competently either: note that it is supposed to have come through the ceiling and neatly placed itself underneath some undamaged cardboard boxes.)
- If it is necessary to produce a fake picture, then the Russians didn't do it.
- QED
A lot to deduce from one photo, isn't it? It used to be that it took more effort to disprove Bellingcat's fakes. He's losing his touch.
Comment: Some of the comments on the bellingcat original are hilarious. We recommend you check them out.