Just a few months ago, Hezbollah exploded a rocket in soccer field with children playing, killing 12 children. Doesn't get much more "exploding devices in public spaces" than that.
Very debatable. The local population seem to be under the impression that it was an iron dome missile that fell on the sports ground. Partly because they claim it is a regular occurance (malfunctioning dome missiles and detritus falling in the area).
Ask yourself, why would the Druze population be a target? It's almost unthinkable that Hezbollah deliberately targeted those civilians.
https://www.timesofisrael.com/11-killed-mostly-children-doze...