Well
The Egyptians will be desperate for it to be anything but a bomb as if it were it would truly screw over their tourist industry.
The French/German/USA will be desperate for it to be a bomb so it can be blamed on 'terrorism' (that's freedom-fighters if you are on the other side) and that the aircraft is 100% OK.
The Russians will be in a quandry.
1. if it was a bomb then they would be forced into some retaliatory action which they probably do not want to get involved in for all sorts or reasons.
2. If it was crew or technical failure then that is not much better as it was their crews and their airlines operating it.
So on balance the Russians would probably hope it is some undetected and undetectable technical issue with the aircraft or engines.