Thales, the French military aerospace company, seems to be behind this band-grab. They're apparently looking to use the 2-meter band to control drones and unmanned aircraft.
The good news is that there is enough 2m equipment out there that there could actually be a feasible mass radio protest and intentionally render the band unusable. There is no way in hell the FCC or similar authorities abroad could ever actually track down all the equipment or have the manpower to deal with violations. They cannot even stop robocalls in the US.
It would be extemely detrimental if we lost the 2M band but this is not the right way to "protest" it.
Fortunately, I don't think this constitutes a real threat to the worldwide amateur 2M band. A "reassignment" of 144-146 MHz worldwide, as described here, is simply not going to happen -- not for this purpose, at least.
I'm not a HAM operator, but I agree that it does seem like a really bad idea to re-assign a band frequently used for stuff like emergency communications. Still, if someone caused a plane to fall down just to make a point then I would assign the blame to that person and not the operator of the plane.