This isn't an attempt at debunking, but there could be other reasons for this. These weapons have been nicknamed "teddy bears" for whatever reason and the toys could be gifts sent to the unit or the individuals operating the vehicles. A bunch of the toys seem to be teddy bears holding hearts, which are less common for children in households and more common for care packages sent to soldiers (also hospital paitents). The motivation behind adorning the vehicles with these could be affection for those who sent the gifts, some kind of joke, or as a decoration meant to humiliate their victims.
The explaination given by OP is the only one I could find attatched to other uploads of this image. Given what we gave seen the IDF do in Gaza it is not below them to decorate their weapons with the belongings of the children they have murdered, orphaned, rendered homeless and/or traumatized. Either explaination of this photo suggests something perverse is going on here.
The Void (2016) Its a fucking awesome not very good movie that does suspense and looking nice very well. The plot is pretty loose, a bunch of people find themselves trapped in a decaying hospital by crowds of cultists outside, inside the hospital are body horror abominations and our intrepid heroes try to figure out what the fuck is going on. Tons of practical special effects, a somewhat nonsensical story, remarkably compelling acting and a really good sense of atmosphere. The Void is a movie with a lot of heart.
The first two of the V/H/S series of short horror anthology films are an absolute blast. I haven't seen the rest but I hear they fell off.